Cheap Flights from Ottawa to Chicago O'Hare International

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 October.

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 foundR 3,343
Cheapest month to flyOctober
Average flight time2 hrs, 27 mins
Most popular airlineUnited
Average flights per week97

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 R 5,915. 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 27 minutes is the average flight time from Ottawa to Chicago O'Hare International.
United, Republic Airways and Air New Zealand fly direct from Ottawa to Chicago O'Hare International.
As of July 2025, there are 97 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 October.
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 Thursday, 16 October 2025.
Yes – the average flight time is 2 hours and 27 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.

Flying from Ottawa to O'Hare International Airport (ORD): What you need to know

  • Ottawa/Macdonald-Cartier International Airport (YOW) is Ottawa's main airport. Explore your options for booking a flight from Ottawa to O'Hare International Airport (ORD) departing from here.

  • O'Hare International Airport is located in Chicago. The city is in the UTC-5 timezone and is one hour behind Ottawa.

  • Arriving two hours before an international flight and one hour ahead of a domestic departure are golden rules for hassle-free flying. Make sure you're at the airport on time to catch your flight from Ottawa to ORD.

  • Peak travel periods mean busier airports, so plan to arrive even earlier. Give yourself at least two hours before a domestic flight and four hours for international journeys to stay on schedule.

Airports in Ottawa

Ottawa Gatineau Airport (YND)

  • Located around 24 kilometres from central Ottawa, YND can be reached in about 20 minutes by car (depending on traffic). The journey by public transport takes roughly 1 hour 40 minutes.

  • If you're catching an early flight from Ottawa to O'Hare International Airport, why not stay somewhere nice and close? Avoid the stress of rushing to the terminal (and enjoy some extra sleep) at Meilleure Auberge. Lovely Room 4mins From Gatineau-Ottawa Airport is another convenient option near Ottawa Gatineau Airport.

Ottawa/Macdonald-Cartier International Airport (YOW)

  • You can book a direct Ottawa to O'Hare International Airport (ORD) plane ticket out of Ottawa/Macdonald-Cartier International Airport (YOW). Work out whether leaving from YOW works best for your plans.

  • From YOW, direct flights from Ottawa to ORD can be booked with United Airlines.

  • United Airlines is the go-to airline for bookings on the YOW to ORD route.

  • The carrier with the best on-time performance is United Airlines. Its Ottawa/Macdonald-Cartier International Airport to O'Hare International Airport flights arrive without delay 67.76% of the time.

  • YOW is around 13 kilometres from central Ottawa. It'll take 20 minutes or so to get to the airport by car from the city centre. Public transport takes approximately 45 minutes.

  • Get your holiday started early with an extra night away from home. Before catching your Ottawa to ORD flight, unwind in one of these hotels close to Ottawa/Macdonald-Cartier International Airport:

  • Ottawa/Macdonald-Cartier International Airport has an on-time performance rate of 58.21%. This figure highlights how frequently flights departing from this airport land on schedule.

  • You'll find YOW at 50 Airport Road.

About O'Hare International Airport (ORD)

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

  • O'Hare International Airport is roughly 26 kilometres from central Chicago. The time it takes to get there in a car hire or cab will depend on the time of day. Do some research before your trip.

  • It takes roughly 55 minutes if you're using public transport.

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

  • Currently, R 3,343 is the best price we've found for a one-way ticket from Ottawa to O'Hare International Airport. The cheapest price for a return flight is R 5,915. Keep in mind fares may change due to demand at the time of booking.

  • Booking ahead of time is often the key to finding a cheap flight from Ottawa to ORD. Prices tend to rise as demand increases, so the closer your departure date, the more it could cost you.

  • Cheap Ottawa to O'Hare International Airport tickets are easier to find when your travel dates are flexible. Use the 'Whole month' search tool to compare fares throughout the month and then choose the cheapest day.

  • You don't need to search every day to find out if fares have dropped when you create a Price Alert. We'll notify you the moment a better deal comes up on plane tickets from Ottawa to ORD.

  • Find a cheap flight from Ottawa to O'Hare International Airport by using filters. Choose your ideal times, airlines and number of stops, then sort the results by 'Cheapest' for the best deals.

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

  • It's time to decide your travel dates for your flight from Ottawa to O'Hare International Airport (ORD). August is when most people visit Chicago. If you're all about a more relaxed kind of trip, head there in February.

  • The warmest month in Chicago is July, with temperatures ranging between 15ºC (59ºF) and 29ºC (84ºF). Lock in your Ottawa to ORD plane ticket then if you enjoy this type of weather.

  • January has temperatures of between -12ºC (10ºF) and 3ºC (37ºF). Look for cheap tickets from Ottawa to O'Hare International Airport around that time if you want to travel in cooler conditions.

More about Chicago

Explore more of the United States

  • Indianapolis is just one of the many places in the United States waiting to be discovered once you've seen Chicago. Around 290 kilometres away to the south-east, check out popular attractions including 9-11 Memorial, Lucas Oil Stadium and Eiteljorg Museum.

  • If you want to check out another great destination in the United States, consider Milwaukee, roughly 121 kilometres north of Chicago. Richards Duplex Apartments by Frank Lloyd Wright, Miller Park and Milwaukee County Zoo are highlights.

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