Cheap Flights from Ottawa to Chicago O'Hare International

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Compare Ottawa to Chicago O'Hare International flight deals

Find the cheapest month or even day of the year to fly to Chicago O'Hare International

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Flight deals from Ottawa to Chicago O'Hare International

Looking for a cheap last-minute deal or the best return flight from Ottawa to Chicago O'Hare International? Find the lowest prices on one-way and return tickets right here.

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

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

Direct flights from Ottawa to Chicago O'Hare International

Ottawa to Chicago O'Hare International: Alternative routes

Compare routes from Ottawa to Chicago below. You may find an airport to fly into that's cheaper, faster, or easier than Chicago O'Hare International.

Ottawa to Chicago: Flight information

The things to know before you go.
Cheapest flight found272 €
Cheapest month to flyAugust
Average flight time2 hrs, 22 mins
Most popular airlineUnited
Average flights per week208

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

The best price we found for a return flight from Ottawa to Chicago O'Hare International is 272 €. 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.
2 hours and 22 minutes is the average flight time from Ottawa to Chicago O'Hare International.
United, Air New Zealand and Air Canada fly direct from Ottawa to Chicago O'Hare International.
As of May 2025, there are 208 flights per week flying from Ottawa to Chicago O'Hare International.
The cheapest month to fly from Ottawa to Chicago O'Hare International is usually May 2025.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Ottawa to Chicago O'Hare International Airport on Tuesday, 12 August 2025.
Yes – the average flight time is 2 hours and 22 minutes.
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 Chicago O'Hare International 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.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Chicago is around 40 days in advance, so don’t leave your flight to the last minute.

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

  • Ottawa's main base, Ottawa/Macdonald-Cartier International Airport (YOW), is where plenty of awesome adventures begin. Explore the options for leaving from here when booking your flight from Ottawa to O'Hare International Airport (ORD).

  • The average length of a direct flight from Ottawa to O'Hare International Airport is 2 hours 28 minutes.

  • The timezone in Chicago is UTC-5, which is 1 hour behind Ottawa. O'Hare International Airport is located in Chicago.

  • The busiest route is from Ottawa/Macdonald-Cartier International Airport (YOW) to O'Hare International Airport (ORD), with 26 direct services every week. If you want to head off as soon as possible, the earliest flight from YOW to ORD is the 06:20 United option. If you prefer to leave later in the day, the final departure is at 18:40 with United.

  • Leave plenty of time to make your flight from Ottawa to ORD. As a general rule, turn up at least two hours before international departures and an hour ahead for domestic flights.

  • You'll likely experience longer lines in popular months such as August and other peak periods. Arriving up to four hours ahead of an international flight and two hours for domestic departures is a smart move.

Airports in Ottawa

Ottawa/Macdonald-Cartier International Airport (YOW)

  • Ottawa/Macdonald-Cartier International Airport (YOW) is a convenient option for travelling directly to your destination. Nonstop flights from Ottawa to O'Hare International Airport (ORD) can be booked from this terminal.

  • If you plan to leave from YOW, you can take a direct flight from Ottawa to O'Hare International Airport with United.

  • YOW is around 13 kilometres from the centre of Ottawa. To help you work out how to get there, use Google Maps. This essential traveller tool will give you the fastest route and your public transport options.

  • Want a hassle-free start to your break? Stay near Ottawa/Macdonald-Cartier International Airport. Whether you've booked an early flight from Ottawa to O'Hare International Airport or just don't want to be rushed, these hotels are perfect:

About O'Hare International Airport (ORD)

Getting from O'Hare International Airport (ORD) to central Chicago

  • O'Hare International Airport to central Chicago is about 35 minutes in a car. It's approximately 40 kilometres away. Find out what options are available, such as car rentals, cabs or ride-sharing services.

  • It takes roughly 54 minutes when travelling by public transport.

How to find the cheapest flights from Ottawa to O'Hare International Airport (ORD)

  • Pick up a one-way ticket from Ottawa to O'Hare International Airport from 167 € or travel return from just 272 €. The prices shown are based on availability and could change when you book.

  • It's usually smart to book early if you want to find cheap tickets from Ottawa to ORD. That's because airlines change prices based on demand, which tends to increase closer to the departure date.

  • If you're flexible with your trip dates, check out the 'Whole month' tool. It'll show you the lowest price across each month when searching for your ticket from Ottawa to O'Hare International Airport.

  • Finding a cheap ticket from Ottawa to ORD is a breeze with Price Alerts. All you need to do is set up one of these automatic alerts and we'll get in touch when the price has dropped.

  • Customise your trip with filters. Adjust the duration, number of stops, and departure and arrival times to find the right flight from Ottawa to O'Hare International Airport. You can also sort the results to see the 'Fastest,' 'Best' or 'Cheapest' options first.

The best time to fly from Ottawa to O'Hare International Airport (ORD)

  • August is the busiest month to hop on a flight from Ottawa to O'Hare International Airport while February is the quietest. To work out the best time to visit Chicago, consider whether you prefer a lively vibe or a quieter pace.

  • Think about the kind of weather that'll work with your plans for Chicago. The warmest month is July. Book your flights from Ottawa to ORD sometime then and you can expect temperatures of between 15ºC and 29ºC.

  • January has average temperatures of between -12ºC and 3ºC. Search for cheap flights from Ottawa to O'Hare International Airport sometime then if you want to travel in cooler conditions.

More about Chicago

Complete your Chicago trip with a car rental

  • Get behind the wheel of one of our car rentals in Chicago and explore the city at your own pace. Easily compare prices from trusted rental companies in one go after booking your hotel and cheap flights from Ottawa to O'Hare International Airport.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.