Cheap Flights from Ontario International to Chicago O'Hare International

Compare Ontario 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

Book the best Chicago O'Hare International fare with no extra fees

Flight deals from Ontario International to Chicago O'Hare International

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

Ontario International to Chicago O'Hare International: Alternative routes

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

Ontario to Chicago: Flight information

The things to know before you go.
Cheapest flight found$181
Cheapest month to flyNovember

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

The best price we found for a return flight from Ontario International to Chicago O'Hare International is $182. 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.
Currently, there are no airlines that fly direct from Ontario International to Chicago O'Hare International. But we found flights with one or more stops from $182.
As of October 2024, there are no flights flying from Ontario International to Chicago O'Hare International.
The cheapest month to fly from Ontario International to Chicago O'Hare International is usually November.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Ontario International Airport to Chicago O'Hare International Airport on Wednesday, 13 November 2024.
No airlines currently offer direct flights between Ontario International Airport and Chicago O'Hare International Airport. Most routes have one or more stops.
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.
Currently, Frontier Airlines offers the cheapest flight tickets to Chicago O'Hare International.

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

  • If you're jetting off during a major holiday or other peak period, give yourself more time. A good rule is two hours ahead of domestic flights and up to four hours before international departures. Check-in and security lines will be longer.

  • If you'd like a stopover for your flight from Ontario International Airport to O'Hare International Airport, just deselect 'Direct flights only' and explore your options. These are the most popular stopovers between ONT and ORD:

    • Denver International Airport

    • Salt Lake City International Airport

    • Harry Reid Airport (formerly McCarran Airport)

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

  • The lowest price we've found for a one-way ticket from Ontario International Airport to O'Hare International Airport is $91. For a return flight on this route, the best price is $182. Depending on the availability and when you book, these fares may change.

  • It's usually smart to book ahead of time if you're hoping to get flight tickets from ONT to ORD. That's because airlines change prices based on demand, which tends to rise closer to the date of departure.

  • Getting flight tickets from Ontario International Airport to O'Hare International Airport is more likely if you can be flexible with your trip dates. Use the 'Whole month' function to see the lowest prices across the month and bag a great deal.

  • Finding a cheap ticket from ONT to ORD is easy with Price Alerts. All you need to do is set up one of these automatic alerts and we'll let you know as soon as the price has dropped.

  • Use filters to tailor your flights from Ontario International Airport to O'Hare International Airport. Enter your ideal departure and arrival times, number of stops and airlines. Alternatively, sort your results by 'Cheapest' to see the best deals.

Handy information about Ontario International Airport (ONT)

Arriving at O'Hare International Airport (ORD)

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

  • O'Hare International Airport is approximately 40 kilometres from the centre of Chicago. With a cab or in your own car rental, the drive is about 35 minutes.

  • It typically takes 54 minutes to get there using public transport.

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

  • The quietest month for a flight from Ontario International Airport to O'Hare International Airport is February, while August is the busiest. Pick the best time to go to Chicago based on whether you prefer a bustling atmosphere or a more laid-back vibe.

  • Book your flight from Ontario International Airport to O'Hare International Airport for July if you want to visit Chicago during its warmest month. Expect temperatures of between 15 ºC and 29 ºC.

  • January has average temperatures of between -12 ºC and 3 ºC. Search for flight tickets from ONT to ORD around that time if you want to travel when it's cooler.

More about Chicago

Complete your Chicago trip with hotels and a car rental

  • Comparing flights is not our only party trick. Once you've secured your cheap ticket to O'Hare International Airport, explore our car rental offers that'll give you the flexibility to travel around at your own pace. Then, take a look at our exclusive rates for hotels to find the ideal Chicago stay.

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