What is the cheapest flight from Chicago to London?

In the last 3 days, the lowest price for a flight from Chicago to London was C$ 446 for a one-way ticket and C$ 856 for a round-trip. Visit our flight page for the latest deals!>/a>

Which aircraft models fly most regularly from Chicago to London?

We unfortunately don’t have that data for this specific route.

Which airline alliances offer flights from Chicago to London?

Star Alliance is the only airline alliance operating flights between Chicago and London.

How does KAYAK find such low prices on flights from Chicago to London?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Chicago to London. Visit our flight page for the latest deals!>/a>

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Chicago to London?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from Chicago is likely to change within 7 days, so travelers know whether to wait or book now. Visit our flight page for the latest deals!>/a>

What is the Hacker Fare option on flights from Chicago to London?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to London with an airline and back to Chicago with another airline. Visit our flight page for the latest deals!>/a>

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Chicago to London?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London from Chicago up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. Visit our flight page for the latest deals!>/a>

C$ 623 Cheap Flights from Chicago to London (CHI - YXU)

CHI - YXU

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Cheap flight deals from Chicago to London (CHI-YXU)

These are the cheapest deals for flights from Chicago to London currently on KAYAK along with options from the most popular airlines KAYAK users selected for this route. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Round-trip

One-way

Recent round-trip flight deals from Chicago to London

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Chicago to London.

Discover the best prices and deals for you by selecting your travel dates.

Choose your dates

2:05 p.m. - 8:20 p.m.ORD-YXU

5h 15m1 stop

5:45 a.m. - 10:10 a.m.YXU-ORD

5h 25m1 stop

C$ 1,196

Find Deal

Fri, 3 Jan - Fri, 10 Jan

12:51 p.m. - 8:20 p.m.ORD-YXU

6h 29m1 stop

9:55 a.m. - 8:05 a.m.YXU-ORD

23h 10m2 stops

C$ 1,205United Airlines

Find Deal

Fri, 3 Jan - Fri, 10 Jan

6:00 a.m. - 2:50 p.m.ORD-YXU

7h 50m2 stops

9:55 a.m. - 9:55 a.m.YXU-ORD

25h 00m2 stops

C$ 1,219United Airlines

Find Deal

Fri, 3 Jan - Fri, 10 Jan

9:05 p.m. - 2:50 p.m.ORD-YXU

16h 45m2 stops

9:55 a.m. - 2:51 p.m.YXU-ORD

5h 56m1 stop

C$ 1,315United Airlines

Find Deal

Sun, 5 Jan - Sun, 12 Jan

9:05 p.m. - 2:50 p.m.ORD-YXU

16h 45m2 stops

5:45 a.m. - 6:55 p.m.YXU-ORD

14h 10m2 stops

C$ 1,336United Airlines

Find Deal

Sun, 5 Jan - Sun, 12 Jan

8:30 p.m. - 9:15 a.m.ORD-YXU

11h 45m1 stop

3:25 p.m. - 7:42 p.m.YXU-ORD

5h 17m1 stop

C$ 1,416United Airlines

Find Deal

Sun, 5 Jan - Sun, 12 Jan

3:31 p.m. - 3:35 p.m.ORD-YXU

23h 04m2 stops

8:00 p.m. - 5:30 a.m.YXU-ORD

34h 30m3 stops

C$ 2,291

Find Deal

Fri, 3 Jan - Fri, 10 Jan

3:31 p.m. - 3:35 p.m.ORD-YXU

23h 04m2 stops

8:00 p.m. - 5:30 a.m.YXU-ORD

34h 30m3 stops

C$ 2,293

Find Deal

Fri, 3 Jan - Fri, 10 Jan

4:20 p.m. - 8:20 p.m.ORD-YXU

27h 00m3 stops

8:00 p.m. - 5:30 a.m.YXU-ORD

34h 30m3 stops

C$ 4,798

Find Deal

Fri, 3 Jan - Fri, 10 Jan

4:20 p.m. - 8:20 p.m.ORD-YXU

27h 00m3 stops

8:00 p.m. - 5:30 a.m.YXU-ORD

34h 30m3 stops

C$ 4,804

Find Deal

Fri, 3 Jan - Fri, 10 Jan

When to book flights from Chicago to London

Are your dates flexible? Find out the best times to travel from Chicago to London based on our flight data from the last year. Discover the cheapest month and even day to fly.

Estimated round-trip price

KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

What is the cheapest flight from Chicago to London?
In the last 3 days, the lowest price for a flight from Chicago to London was C$ 446 for a one-way ticket and C$ 856 for a round-trip.
Which aircraft models fly most regularly from Chicago to London?
We unfortunately don’t have that data for this specific route.
Which airline alliances offer flights from Chicago to London?
Star Alliance is the only airline alliance operating flights between Chicago and London.
How does KAYAK find such low prices on flights from Chicago to London?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Chicago to London.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Chicago to London?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from Chicago is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Chicago to London?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to London with an airline and back to Chicago with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Chicago to London?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London from Chicago up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Book cheap flights from Chicago to London

Recent one-way flight deals

Only flying one-way? Below are some of the best one-way flight deals from Chicago to London found on KAYAK in the last 72 hours.

4/1Sat

1 stopUnited Airlines

5h 15mORD-YXU

C$ 623

5/1Sun

2 stopsUnited Airlines

16h 45mORD-YXU

C$ 625

4/1Sat

2 stops

36h 45mORD-YXU

C$ 635

5/1Sun

1 stopAir Canada

17h 20mORD-YXU

C$ 720

4/1Sat

3 stops

44h 18mORD-YXU

C$ 1,249

Everything you need to know for your flight from Chicago to London

Information on your arrival and departure airports

London (YXU)

CHI - YXU

C$ 623 Find cheap flights from Chicago to London

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Chicago to London departing on 4/1. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.

Search hundreds of travel sites at once for deals on flights to London

Cheap flight deals from Chicago to London (CHI-YXU)

Recent round-trip flight deals from Chicago to London

Recent one-way flight deals from Chicago to London

When to book flights from Chicago to London

FAQs for booking flights from Chicago to London

What is the cheapest flight from Chicago to London?

Which aircraft models fly most regularly from Chicago to London?

Which airline alliances offer flights from Chicago to London?

How does KAYAK find such low prices on flights from Chicago to London?

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Chicago to London?

What is the Hacker Fare option on flights from Chicago to London?

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Chicago to London?

Book cheap flights from Chicago to London

Recent one-way flight deals

Search by stops

Search by airline

Search by price

Everything you need to know for your flight from Chicago to London

Information on your arrival and departure airports

Cabin class types available on flights from Chicago to London

Cabin classes available on flights from Chicago to London. Prices are the lowest found on KAYAK over the last 7 days. Price and availability are not guaranteed.

Complete your trip to London with a hotel stay or car rental

Flights to other popular destinations

The most popular flights on KAYAK according to clicks in the last 2 weeks. Prices are the lowest found on KAYAK over the last 7 days. Price and availability are not guaranteed.

Flights from domestic origins to London

Flights from all airports within Chicago to London. Prices are the lowest found on KAYAK over the last 7 days. Price and availability are not guaranteed.

Choose which airport to fly into in London