152 € Cheap Flights from Chicago O'Hare International to San Diego

Return selected

origin

Enter the city you're flying from, or choose from the options below

Include nearby airports

selected

destination

. Enter your destination, or choose from the options below

Include nearby airports

selected

Travellers and cabin class, 1 Adult, Economy

Compare Chicago O'Hare International to San Diego flight deals

Find the cheapest month or even day of the year to fly to San Diego

Book the best San Diego fare with no extra fees

Flight deals Cheapest month Find the best route Route info FAQs Tips and advice

Flight deals from Chicago O'Hare International to San Diego

Looking for a cheap last-minute deal or the best return flight from Chicago O'Hare International Airport to San Diego? If you want to travel next month, return fares start from 172 €. Find the lowest prices on one-way and return tickets right here.

San Diego.152 € per passenger.Departing Wed, 4 Nov, returning Tue, 10 Nov.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Chicago O'Hare International on Wed, 4 Nov, arriving in San Diego International.Inbound indirect flight with Frontier Airlines, departs from San Diego International on Tue, 10 Nov, arriving in Chicago O'Hare International.Price includes taxes and charges.From 152 €, select.

San Diego.167 € per passenger.Departing Mon, 7 Dec, returning Sat, 12 Dec.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Chicago O'Hare International on Mon, 7 Dec, arriving in San Diego International.Inbound indirect flight with Frontier Airlines, departs from San Diego International on Sat, 12 Dec, arriving in Chicago O'Hare International.Price includes taxes and charges.From 167 €, select.

San Diego.168 € per passenger.Departing Wed, 28 Oct, returning Wed, 4 Nov.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Chicago O'Hare International on Wed, 28 Oct, arriving in San Diego International.Inbound indirect flight with Frontier Airlines, departs from San Diego International on Wed, 4 Nov, arriving in Chicago O'Hare International.Price includes taxes and charges.From 168 €, select.

San Diego.172 € per passenger.Departing Sat, 24 Oct, returning Wed, 28 Oct.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Chicago O'Hare International on Sat, 24 Oct, arriving in San Diego International.Inbound indirect flight with Frontier Airlines, departs from San Diego International on Wed, 28 Oct, arriving in Chicago O'Hare International.Price includes taxes and charges.From 172 €, select.

San Diego.205 € per passenger.Departing Wed, 30 Sep, returning Sat, 3 Oct.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Chicago O'Hare International on Wed, 30 Sep, arriving in San Diego International.Inbound indirect flight with Frontier Airlines, departs from San Diego International on Sat, 3 Oct, arriving in Chicago O'Hare International.Price includes taxes and charges.From 205 €, select.

San Diego.220 € per passenger.Departing Tue, 6 Oct, returning Tue, 13 Oct.Return flight with United.Outbound direct flight with United departs from Chicago O'Hare International on Tue, 6 Oct, arriving in San Diego International.Inbound direct flight with United departs from San Diego International on Tue, 13 Oct, arriving in Chicago O'Hare International.Price includes taxes and charges.From 220 €, select.

San Diego.220 € per passenger.Departing Tue, 10 Nov, returning Sat, 14 Nov.Return flight with United.Outbound direct flight with United departs from Chicago O'Hare International on Tue, 10 Nov, arriving in San Diego International.Inbound direct flight with United departs from San Diego International on Sat, 14 Nov, arriving in Chicago O'Hare International.Price includes taxes and charges.From 220 €, select.

San Diego.221 € per passenger.Departing Wed, 23 Sep, returning Wed, 30 Sep.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Chicago O'Hare International on Wed, 23 Sep, arriving in San Diego International.Inbound indirect flight with Frontier Airlines, departs from San Diego International on Wed, 30 Sep, arriving in Chicago O'Hare International.Price includes taxes and charges.From 221 €, select.

San Diego.230 € per passenger.Departing Mon, 23 Nov, returning Tue, 1 Dec.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Chicago O'Hare International on Mon, 23 Nov, arriving in San Diego International.Inbound indirect flight with Frontier Airlines, departs from San Diego International on Tue, 1 Dec, arriving in Chicago O'Hare International.Price includes taxes and charges.From 230 €, select.

San Diego.236 € per passenger.Departing Tue, 5 Jan, returning Tue, 12 Jan.Return flight with Alaska Airlines.Outbound direct flight with Alaska Airlines departs from Chicago O'Hare International on Tue, 5 Jan, arriving in San Diego International.Inbound direct flight with Alaska Airlines departs from San Diego International on Tue, 12 Jan, arriving in Chicago O'Hare International.Price includes taxes and charges.From 236 €, select.

San Diego.237 € per passenger.Departing Mon, 12 Oct, returning Tue, 1 Dec.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Chicago O'Hare International on Mon, 12 Oct, arriving in San Diego International.Inbound indirect flight with Frontier Airlines, departs from San Diego International on Tue, 1 Dec, arriving in Chicago O'Hare International.Price includes taxes and charges.From 237 €, select.

San Diego.238 € per passenger.Departing Wed, 9 Jun, returning Mon, 14 Jun.Return flight with United.Outbound direct flight with United departs from Chicago O'Hare International on Wed, 9 Jun, arriving in San Diego International.Inbound direct flight with United departs from San Diego International on Mon, 14 Jun, arriving in Chicago O'Hare International.Price includes taxes and charges.From 238 €, select.

San Diego.238 € per passenger.Departing Thu, 26 Nov, returning Thu, 3 Dec.Return flight with United.Outbound direct flight with United departs from Chicago O'Hare International on Thu, 26 Nov, arriving in San Diego International.Inbound direct flight with United departs from San Diego International on Thu, 3 Dec, arriving in Chicago O'Hare International.Price includes taxes and charges.From 238 €, select.

San Diego.238 € per passenger.Departing Sat, 27 Mar, returning Tue, 30 Mar.Return flight with United.Outbound direct flight with United departs from Chicago O'Hare International on Sat, 27 Mar, arriving in San Diego International.Inbound direct flight with United departs from San Diego International on Tue, 30 Mar, arriving in Chicago O'Hare International.Price includes taxes and charges.From 238 €, select.

San Diego.238 € per passenger.Departing Thu, 18 Feb, returning Mon, 22 Feb.Return flight with United.Outbound direct flight with United departs from Chicago O'Hare International on Thu, 18 Feb, arriving in San Diego International.Inbound direct flight with United departs from San Diego International on Mon, 22 Feb, arriving in Chicago O'Hare International.Price includes taxes and charges.From 238 €, select.

San Diego.238 € per passenger.Departing Wed, 30 Sep, returning Sat, 3 Oct.Return flight with United.Outbound direct flight with United departs from Chicago O'Hare International on Wed, 30 Sep, arriving in San Diego International.Inbound direct flight with United departs from San Diego International on Sat, 3 Oct, arriving in Chicago O'Hare International.Price includes taxes and charges.From 238 €, select.

Find the cheapest month to fly from Chicago O'Hare International to San Diego

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Chicago O'Hare International to San Diego flights are currently cheapest in November.

Sep

Oct

Nov

Dec

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Direct flights from Chicago O'Hare International to San Diego

Alternative Chicago O'Hare International to San Diego routes

Looking for the cheapest, fastest or easiest route from Chicago O'Hare International to San Diego? You could fly into the following airports instead.

San Diego International

4km from central San Diego

ClosestCheapest

from 152 €

Search flights

McClellan-Palomar

48km from central San Diego

from 308 €

Search flights

Chicago to San Diego: Flight information

The things to know before you go.

Cheapest flight found	152 €
Cheapest month to fly	November
Average flight time	4 hrs, 33 mins
Most popular airline	American Airlines
Average flights per week	439

Finding cheap flights from Chicago O'Hare International to San Diego: Frequently asked questions

How many airports are there in San Diego?

There are 2 airports in San Diego: San Diego International and McClellan-Palomar.

How much are return flights from Chicago O'Hare International to San Diego?

The best price we found for a return flight from Chicago O'Hare International to San Diego is 152 €. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

How long does it take to fly from Chicago O'Hare International to San Diego?

4 hours and 33 minutes is the average flight time from Chicago O'Hare International to San Diego.

Which airlines fly direct from Chicago O'Hare International to San Diego?

American Airlines, Qatar Airways and British Airways fly direct from Chicago O'Hare International to San Diego.

How many flights are there a week from Chicago O'Hare International to San Diego?

As of September 2026, there are 439 flights per week flying from Chicago O'Hare International to San Diego.

When is the cheapest time to fly from Chicago O'Hare International to San Diego?

The cheapest month to fly from Chicago O'Hare International to San Diego is usually November.

Which is the cheapest airport to fly into in San Diego?

If you're flying from Chicago O'Hare International Airport, the cheapest airport near San Diego is San Diego International – which is 4.1 km away from the centre of San Diego. We've found flights into this airport from 152 €.

Which upcoming date is cheapest to fly from Chicago O'Hare International Airport to San Diego on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Chicago O'Hare International Airport to San Diego on Wednesday, 4 November 2026.

Can I get a direct flight from Chicago O'Hare International Airport to San Diego?

Yes – the average flight time is 4 hours and 33 minutes.

How can I get the best flight deal from Chicago O'Hare International Airport to San Diego?

We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to San Diego but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

When is the best time to book flights to San Diego?

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to San Diego is around 40 days in advance, so don’t leave your flight to the last minute.

What’s the weather like in San Diego?

In September, the average temperature is usually around 21°C. September is typically the warmest month in San Diego, when it usually averages around 24°C. You can expect the least rain in July. The coldest month is March, with temperatures averaging 12°C. The rainiest month is March.

Which is the cheapest airline to fly from Chicago O'Hare International Airport to San Diego with?

Currently, Frontier Airlines and United offer the cheapest flight tickets to San Diego.

Travelling from Chicago O'Hare International Airport (ORD) to San Diego: what you need to know

The average length of a direct flight from Chicago O'Hare International Airport to San Diego is 4 hours 10 minutes.
The timezone in San Diego is UTC-8. The city is two hours behind Chicago, where Chicago O'Hare International Airport is located.
Chicago O'Hare International Airport (ORD) to San Diego International Airport (SAN) is the busiest route. When looking for your flight, you can select from 77 services each week between ORD and SAN.
Allow plenty of time to catch your ORD to San Diego flight. As a general rule, arrive two hours before international departures and an hour ahead for domestic flights.
Travelling during a peak month like July? School holidays and other high seasons can lead to longer lines and delays at security. Be extra cautious and get there up to four hours before an international flight and two hours before a domestic departure.
Begin your journey at ORD and fly nonstop to San Diego International Airport (SAN). That will be your arrival point when searching for Chicago O'Hare International Airport to San Diego tickets.
Choose from a variety of airlines that offer direct flights from Chicago O'Hare International Airport to San Diego. Book your journey with one of these:
Travelling from central Chicago to ORD takes about 45 minutes on public transport. If you ride-share, drive or grab a taxi, you'll cover the 26 kilometres in 30 minutes or so, depending on traffic.
Searching for a hotel close to ORD? If you're catching an early flight from Chicago O'Hare International Airport to San Diego, these stays will put you moments from check-in:
Of all flights departing from Chicago O'Hare International Airport, 70% land on schedule at their destination.
ORD is located at 10000 West O'Hare.

How to find the cheapest flights from Chicago O'Hare International Airport (ORD) to San Diego

The lowest price we've found for a one-way Chicago O'Hare International Airport to San Diego flight is 99 €. The cheapest price for a return flight is 152 €. Bear in mind fares may change due to demand at the time of booking.
To find cheap flights from ORD to San Diego, book ahead. Airlines generally offer lower fares when flights are first released.
Finding cheap tickets from Chicago O'Hare International Airport to San Diego is easier if you're flexible with your travel dates. Use the 'Whole month' search tool to get the lowest prices across every month and pick up an awesome deal.
Save time searching for cheap flights from ORD to San Diego by creating a Price Alert. You'll get an email or notification on the app when fares go down.
Choose your ideal arrival and departure times, airlines and number of stops with our filters. Then, sort the results for your flight from Chicago O'Hare International Airport to San Diego by 'Cheapest,' 'Fastest' or 'Best.'

Airports in San Diego

San Diego International Airport (SAN)

San Diego International Airport (SAN) is around 5 kilometres from central San Diego. If you're opting for a ride-share or a taxi, the drive takes about 15 minutes.
If you're travelling on public transport, expect a journey time of about 25 minutes.
If you're arriving on a late flight from Chicago O'Hare International Airport to San Diego, nothing beats the convenience of staying close to the terminal. Pick up your bags from the carousel and then be showered and resting not long after at one of these hotels near SAN:
For the best deal, book your vehicle from San Diego International Airport around two weeks in advance of your flight from ORD to San Diego.
You'll find SAN at N Harbour Dr.

McClellan-Palomar Airport (CLD)

If you're staying in central San Diego (or just want to see the sights straight away), the city is around 48 kilometres from McClellan-Palomar Airport (CLD). Look for any information desks to point you in the right direction after disembarking your flight from Chicago O'Hare International Airport to San Diego.
There are some great places to park your luggage (and yourself) near CLD. Kick back and get cosy after your ORD to San Diego flight at any of these well-located options:
Generally, the sooner you book, the better the deals and selection of vehicles. Secure your ride from CLD once you know your travel dates.

Best time to go to San Diego

It's time to choose your trip dates for your flight from Chicago O'Hare International Airport to San Diego. July is the most popular month to visit San Diego. If you prefer a more relaxed vibe, go in December.
Book a Chicago O'Hare International Airport to San Diego plane ticket with a departure in August to explore the city during its warmest month. Expect temperatures to range from 16ºC (61ºF) to 27ºC (81ºF).
February sees average temperatures of between 8ºC (46ºF) and 22ºC (72ºF). Look for a cheap ticket from ORD to San Diego around that time if you like cooler conditions.

More about San Diego

Start your San Diego trip right by choosing the perfect place to stay. Once you've booked your flight from Chicago O'Hare International Airport to San Diego, explore our range of hotels including:
There are so many things to see and do in this city it can be hard to know where to begin. San Diego Balboa Park, San Diego Zoo and USS Midway Museum are leading attractions which should feature on any good San Diego itinerary.

Explore more of the United States

You've seen San Diego, now it's time to explore other parts of the United States. Travel about 177 kilometres northwest to Los Angeles to tick off its popular sights. From Hollywood Sign to Universal Studios Hollywood and Hollywood Bowl, you've got a jam-packed schedule ahead.
Around 483 kilometres east of San Diego, Phoenix is another essential stop in the United States. Get a taste of what this destination has to offer at Camelback Mountain, Yayoi Kusama Fireflies Infinity Mirror Room and Heard Museum.