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209 € Cheap Flights from Chicago Midway to Ontario International

Compare Chicago Midway to Ontario International flight deals

Find the cheapest month or even day of the year to fly to Ontario International

Book the best Ontario International fare with no extra fees

Flight deals from Chicago Midway to Ontario International

Looking for a cheap last-minute deal or the best return flight from Chicago Midway Airport to Ontario International Airport? If you want to travel next month, return fares start from 209 €. Find the lowest prices on one-way and return tickets right here.
Ontario.209 € per passenger.Departing Wed, 6 Jan, returning Tue, 12 Jan.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Chicago Midway on Wed, 6 Jan, arriving in Ontario International.Inbound direct flight with Southwest Airlines departs from Ontario International on Tue, 12 Jan, arriving in Chicago Midway.Price includes taxes and charges.From 209 €, select.
Ontario.209 € per passenger.Departing Thu, 3 Dec, returning Mon, 7 Dec.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Chicago Midway on Thu, 3 Dec, arriving in Ontario International.Inbound direct flight with Southwest Airlines departs from Ontario International on Mon, 7 Dec, arriving in Chicago Midway.Price includes taxes and charges.From 209 €, select.
Ontario.209 € per passenger.Departing Wed, 10 Feb, returning Wed, 24 Feb.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Chicago Midway on Wed, 10 Feb, arriving in Ontario International.Inbound direct flight with Southwest Airlines departs from Ontario International on Wed, 24 Feb, arriving in Chicago Midway.Price includes taxes and charges.From 209 €, select.
Ontario.209 € per passenger.Departing Wed, 27 Jan, returning Wed, 3 Feb.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Chicago Midway on Wed, 27 Jan, arriving in Ontario International.Inbound direct flight with Southwest Airlines departs from Ontario International on Wed, 3 Feb, arriving in Chicago Midway.Price includes taxes and charges.From 209 €, select.
Ontario.209 € per passenger.Departing Thu, 24 Sep, returning Wed, 30 Sep.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Chicago Midway on Thu, 24 Sep, arriving in Ontario International.Inbound direct flight with Southwest Airlines departs from Ontario International on Wed, 30 Sep, arriving in Chicago Midway.Price includes taxes and charges.From 209 €, select.
Ontario.209 € per passenger.Departing Mon, 17 Aug, returning Sat, 29 Aug.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Chicago Midway on Mon, 17 Aug, arriving in Ontario International.Inbound direct flight with Southwest Airlines departs from Ontario International on Sat, 29 Aug, arriving in Chicago Midway.Price includes taxes and charges.From 209 €, select.
Ontario.209 € per passenger.Departing Thu, 8 Oct, returning Thu, 12 Nov.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Chicago Midway on Thu, 8 Oct, arriving in Ontario International.Inbound direct flight with Southwest Airlines departs from Ontario International on Thu, 12 Nov, arriving in Chicago Midway.Price includes taxes and charges.From 209 €, select.
Ontario.209 € per passenger.Departing Wed, 30 Sep, returning Tue, 13 Oct.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Chicago Midway on Wed, 30 Sep, arriving in Ontario International.Inbound direct flight with Southwest Airlines departs from Ontario International on Tue, 13 Oct, arriving in Chicago Midway.Price includes taxes and charges.From 209 €, select.
Ontario.209 € per passenger.Departing Tue, 3 Nov, returning Wed, 18 Nov.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Chicago Midway on Tue, 3 Nov, arriving in Ontario International.Inbound direct flight with Southwest Airlines departs from Ontario International on Wed, 18 Nov, arriving in Chicago Midway.Price includes taxes and charges.From 209 €, select.
Ontario.209 € per passenger.Departing Wed, 18 Nov, returning Wed, 9 Dec.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Chicago Midway on Wed, 18 Nov, arriving in Ontario International.Inbound direct flight with Southwest Airlines departs from Ontario International on Wed, 9 Dec, arriving in Chicago Midway.Price includes taxes and charges.From 209 €, select.
Ontario.209 € per passenger.Departing Sat, 3 Oct, returning Tue, 6 Oct.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Chicago Midway on Sat, 3 Oct, arriving in Ontario International.Inbound direct flight with Southwest Airlines departs from Ontario International on Tue, 6 Oct, arriving in Chicago Midway.Price includes taxes and charges.From 209 €, select.
Ontario.210 € per passenger.Departing Sat, 17 Oct, returning Wed, 16 Dec.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Chicago Midway on Sat, 17 Oct, arriving in Ontario International.Inbound direct flight with Southwest Airlines departs from Ontario International on Wed, 16 Dec, arriving in Chicago Midway.Price includes taxes and charges.From 210 €, select.
Ontario.217 € per passenger.Departing Wed, 26 Aug, returning Tue, 15 Sep.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Chicago Midway on Wed, 26 Aug, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Tue, 15 Sep, arriving in Chicago Midway.Price includes taxes and charges.From 217 €, select.
Ontario.234 € per passenger.Departing Mon, 31 Aug, returning Sun, 6 Sep.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Chicago Midway on Mon, 31 Aug, arriving in Ontario International.Inbound direct flight with Southwest Airlines departs from Ontario International on Sun, 6 Sep, arriving in Chicago Midway.Price includes taxes and charges.From 234 €, select.
Ontario.259 € per passenger.Departing Tue, 15 Sep, returning Sat, 12 Dec.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Chicago Midway on Tue, 15 Sep, arriving in Ontario International.Inbound direct flight with Southwest Airlines departs from Ontario International on Sat, 12 Dec, arriving in Chicago Midway.Price includes taxes and charges.From 259 €, select.
Ontario.259 € per passenger.Departing Tue, 8 Dec, returning Tue, 5 Jan.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Chicago Midway on Tue, 8 Dec, arriving in Ontario International.Inbound direct flight with Southwest Airlines departs from Ontario International on Tue, 5 Jan, arriving in Chicago Midway.Price includes taxes and charges.From 259 €, select.

Find the cheapest month to fly from Chicago Midway to Ontario International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Chicago Midway to Ontario International flights are currently cheapest in August.
Jul
from 532 €
Aug
from 209 €
Sep
from 209 €
Oct
from 209 €
Nov
from 209 €
Dec
from 209 €
Jan
from 209 €
Feb
from 209 €
Mar
from 263 €
Apr
from 418 €
May
from 429 €
Jun
Find prices

Direct flights from Chicago Midway to Ontario International

Chicago Midway to Ontario International: Alternative routes

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

Ontario International

4km from central Ontario
Closest
from 209 €
Search flights

San Bernardino Norton AFB

39km from central Ontario
from 402 €
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Santa Ana John Wayne

48km from central Ontario
from 269 €
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Long Beach Municipal

54km from central Ontario
from 261 €
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Hawthorne

65km from central Ontario
Search flights

Burbank

67km from central Ontario
from 294 €
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Los Angeles International

71km from central Ontario
Cheapest
from 207 €
Search flights

Chicago to Ontario: Flight information

The things to know before you go.
Cheapest flight found209 €
Cheapest month to flyNovember
Average flight time4 hrs, 16 mins
Most popular airlineSouthwest Airlines
Average flights per week9

Finding cheap flights from Chicago Midway to Ontario International: Frequently asked questions

The best price we found for a return flight from Chicago Midway to Ontario International is 209 €. 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.
4 hours and 16 minutes is the average flight time from Chicago Midway to Ontario International.
Southwest Airlines flies direct from Chicago Midway to Ontario International.
As of July 2026, there are 9 flights per week flying from Chicago Midway to Ontario International.
The cheapest month to fly from Chicago Midway to Ontario International is usually November.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Chicago Midway Airport to Ontario International Airport on Tuesday, 3 November 2026.
Yes – the average flight time is 4 hours and 16 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 Ontario 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 Ontario is around 40 days in advance, so don’t leave your flight to the last minute.

Currently, Southwest Airlines offers the cheapest flight tickets to Ontario International.

Travelling from Chicago Midway Airport (MDW) to Ontario International Airport (ONT): what you need to know

  • Around 4 hours 10 minutes is how long you can expect to be in the air on a direct flight from Chicago Midway Airport to Ontario International Airport.

  • The timezone in Ontario is UTC-8, which is two hours behind Chicago.

  • Flights from MDW to ONT start from 08:25 — the first with Southwest Airlines. The latest departure is at 21:05 with Southwest Airlines. In total, you can choose from four weekly Chicago Midway Airport to Ontario International Airport flights.

  • Arrive at the airport on time so you don't miss your MDW to ONT flight. Be there at least two hours ahead for international flights and an hour early for domestic departures to avoid sprinting to your gate.

  • You can expect longer lines in popular months like July. Arriving up to four hours ahead of international flights and two hours for a domestic departure will help ensure a smooth travel experience.

  • Travelling to Ontario (and then exploring more of the United States!) is a breeze with Southwest Airlines. This popular carrier has direct flights from Chicago Midway Airport to Ontario International Airport.

  • The airline that serves the most passengers on this route is Southwest Airlines.

  • The most punctual carrier that offers MDW to ONT flights is Southwest Airlines. Its services arrive as planned 79.49% of the time.

  • If you want to break up your flight, just deselect 'Direct flights only' when searching for your ticket from Chicago Midway Airport to Ontario International Airport. Here are the top stopovers between MDW and ONT:

    • Denver International Airport

    • Phoenix Sky Harbour Airport

    • Harry Reid International Airport

Handy information about Chicago Midway Airport (MDW)

  • You'll find MDW at 5700 South Cicero.

  • Of all flights departing from Chicago Midway Airport, 76% arrive as scheduled at their destination.

  • Central Chicago to Chicago Midway Airport is around 16 kilometres. Depending on traffic, it'll take about 25 minutes to get there if you're ride-sharing, catching a taxi or driving.

  • The journey on public transport usually takes 30 minutes.

  • Searching for a convenient hotel close to MDW? If you've booked an early flight from Chicago Midway Airport to Ontario International Airport, these stays will have you sleeping moments from your check-in counter:

Arriving at Ontario International Airport (ONT)

Getting from Ontario International Airport (ONT) to central Ontario

  • ONT is located at 2900 E. Airport Drive.

  • Ontario International Airport to central Ontario has a drive time of around 15 minutes. It's approximately 10 kilometres away.

  • Travelling by public transport takes around 45 minutes.

When to fly to Ontario International Airport (ONT)

  • It's time to choose your travel dates for your flight from Chicago Midway Airport to Ontario International Airport. July is the most popular month to head to Ontario. If you prefer a more relaxed vibe, go in March.

  • Before locking in your flight from Chicago Midway Airport to Ontario International Airport, think about the kind of weather you enjoy. August is the warmest month in Ontario, with the temperature ranging from 16ºC (61ºF) to 36ºC (97ºF).

  • February has average temperatures of between 4ºC (39ºF) and 24ºC (75ºF). Search for cheap tickets from MDW to ONT around that time if you want to travel in cooler conditions.

Explore more of the United States

  • Ontario is easy to fall in love with, but there are so many other parts of the United States you'll want to see. Around 56 kilometres west of Ontario, a trip to Los Angeles will keep you busy. Start with leading attractions like Hollywood Sign, Universal Studios Hollywood and Hollywood Bowl.

  • Around 153 kilometres south of Ontario, San Diego is another favourite stop in the United States. Start your sightseeing at San Diego Zoo, San Diego Balboa Park and USS Midway Museum.

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.