Cheap Flights from Ottawa International to Chicago O'Hare International

Compare Ottawa International 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 International to Chicago O'Hare International

Looking for a cheap last-minute deal or the best return flight from Ottawa International 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 International 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 International to Chicago O'Hare International flights are currently cheapest in April.

Direct flights from Ottawa International to Chicago O'Hare International

Ottawa International to Chicago O'Hare International: Alternative routes

Compare routes from Ottawa International 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 foundR 2,734
Cheapest month to flyApril
Average flight time2 hrs, 28 mins
Most popular airlineUnited
Average flights per week108

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

The best price we found for a return flight from Ottawa International to Chicago O'Hare International is R 4,456. 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 28 minutes is the average flight time from Ottawa International to Chicago O'Hare International.
United, Air New Zealand and Air Canada fly direct from Ottawa International to Chicago O'Hare International.
As of February 2026, there are 108 flights per week flying from Ottawa International to Chicago O'Hare International.
The cheapest month to fly from Ottawa International to Chicago O'Hare International is usually April.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Ottawa International Airport to Chicago O'Hare International Airport on Thursday, 16 April 2026.
Yes – the average flight time is 2 hours and 28 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.
Currently, Porter Airlines and United offer the cheapest flight tickets to Chicago O'Hare International.

Travelling from Ottawa/Macdonald-Cartier International Airport (YOW) to O'Hare International Airport (ORD): what you need to know

  • Take a direct flight from Ottawa/Macdonald-Cartier International Airport to O'Hare International Airport and you'll be travelling for an average of 2 hours 30 minutes.

  • Chicago's timezone is UTC-5, which makes Chicago one hour behind Ottawa.

  • Each week, there are 26 Ottawa/Macdonald-Cartier International Airport to O'Hare International Airport flights. If you prefer to be on board as early as possible, pick the 06:20 United Airlines flight. If you're eager to make the most of your day before flying, the latest flight is at 18:40 with United Airlines.

  • For a stress-free journey, turn up at the airport two hours ahead of international flights and an hour before domestic departures. This will give you plenty of time to board your YOW to ORD flight.

  • Travelling during a peak month like July? Major public holidays and other popular seasons can lead to longer queues at airport checkpoints. Be extra cautious and get there up to four hours ahead of an international flight and two hours before domestic departures.

  • United Airlines is your gateway to exploring Chicago (and perhaps some other great parts of United States!). Browse the direct flights from Ottawa/Macdonald-Cartier International Airport to O'Hare International Airport offered by this airline.

  • United Airlines has the highest passenger demand on this route.

  • The most punctual carrier operating YOW to ORD flights is United Airlines. Its services arrive as scheduled 67.76% of the time.

How to find the cheapest flights from Ottawa/Macdonald-Cartier International Airport (YOW) to O'Hare International Airport (ORD)

  • The lowest price we've seen for a one-way Ottawa/Macdonald-Cartier International Airport to O'Hare International Airport flight is R 2,734. A return plane ticket right now is R 4,456. Depending on the availability and when you book, these fares can change.

  • To pick up cheap tickets from YOW to ORD, book your journey six months ahead of your departure date.

  • The cheapest month for flights from Ottawa/Macdonald-Cartier International Airport to O'Hare International Airport is May. Use the 'Whole month' tool to see the lowest airfares if you have flexible dates.

  • Save time searching for cheap flights from YOW to ORD by creating a Price Alert. You'll get an email or notification through the app when a new low fare is offered.

  • Select your preferred departure and arrival times, number of stops and airlines with the filters. Or sort your results by 'Cheapest' to find the best deals on flights from Ottawa/Macdonald-Cartier International Airport to O'Hare International Airport.

Handy information about Ottawa/Macdonald-Cartier International Airport (YOW)

  • YOW is located at 50 Airport Road.

  • 58.21% of flights that leave from Ottawa/Macdonald-Cartier International Airport make it to their destination on time.

  • To reach Ottawa/Macdonald-Cartier International Airport from central Ottawa, it'll take about 20 minutes by car. This depends on traffic though. It's approximately 13 kilometres from the airport to the city centre.

  • Taking public transport? Expect a trip time of around 45 minutes.

  • Searching for a handy hotel close to YOW? If you've booked an early flight from Ottawa/Macdonald-Cartier International Airport to O'Hare International Airport, these stays will have you moments from your departure lounge:

Arriving at O'Hare International Airport (ORD)

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

  • You'll find ORD at 10000 West O'Hare.

  • From O'Hare International Airport, Chicago is approximately 40 kilometres away. It takes around 35 minutes to reach the centre by car.

  • When travelling on public transport, expect a journey time of about 55 minutes.

When to fly to O'Hare International Airport (ORD)

  • August is the busiest month for flights from Ottawa/Macdonald-Cartier International Airport to O'Hare International Airport. To avoid the crowds, head to Chicago in January.

  • Book your flight from Ottawa/Macdonald-Cartier International Airport to O'Hare International Airport for July if you'd like to visit Chicago during its warmest month. Expect temperatures of between 15ºC (59ºF) and 29ºC (84ºF).

  • If you like cooler conditions, look for a cheap ticket from YOW to ORD in January. Average temperatures are between -12ºC (10ºF) and 3ºC (37ºF) then.

Explore more of United States

  • Chicago has its own special appeal, but there are so many other corners of United States just waiting to be discovered. Around 451 kilometres south-east of Chicago, a visit to Columbus will keep you on the go. Start with leading attractions like Franklin Park Conservatory and Botanical Gardens, Ohio Statehouse and German Village.

  • Around 257 kilometres south-east of Chicago, Indianapolis is another favourite stop in United States. Experience major highlights starting with The Children's Museum of Indianapolis, Indianapolis Museum of Art and Indianapolis Zoo.

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