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Flights from Chicago to London

What to know about flights from Chicago to London?

The approximate distance between Chicago and London is 547.62 km. According to Trip.com data, travel demand hits its peak in November.

Cheapest one-way
US$476
United Airlines United Airlines CHI-YXU 4h 22m · 1 stop Sat, Nov 21
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Cheapest round-trip
US$799
United Airlines United Airlines CHI-YXU 4h 55m · 2 stops Sun, Nov 1 - Sun, Nov 8
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Recommended airlines
United Airlines United Airlines Cheapest · From US$476
When to fly
September
Cheapest
November
Peak season
Route details
547.62 km
Flight distance

Explore the cheapest one-way and round-trip flights from Chicago to London over the next 90 days, with one-way fares from US$476 and round-trip from US$799. Based on Trip.com's latest 7-day flight data.

      • ORD 13:57
        4h 55m
        1 stop
        YXU 19:52
        Chicago - London | Sun, Nov 1 | United Airlines
        YXU 05:30
        4h 53m
        1 stop
        ORD 09:23
        London - Chicago | Sun, Nov 8 | United Airlines
        US$799 US$1,027
        22% off
        22% off
        US$1,027 US$799
      • ORD 21:21
        10h 16m
        1 stop
        YXU 08:37
        Chicago - London | Sun, Nov 1 | Air Canada
        YXU 05:30
        4h 53m
        1 stop
        ORD 09:23
        London - Chicago | Sun, Nov 8 | United Airlines
        US$934 US$1,027
        9% off
        9% off
        US$1,027 US$934
      • CHI 13:00
        17h 25m
        1 stop
        YXU 14:00
        Chicago - London | Sun, Oct 11 | Normal Airline
        YXU 15:00
        6h
        Nonstop
        CHI 16:00
        London - Chicago | Tue, Oct 13 | Normal Airline
        More cheap flights
        More cheap flights
      • ORD 16:30
        4h 22m
        1 stop
        YXU 21:52
        Chicago - London | Sat, Nov 21 | United Airlines
        US$476 US$648
        27% off
        27% off
        US$648 US$476
      • ORD 12:59
        5h 41m
        1 stop
        YXU 19:40
        Chicago - London | Tue, Oct 20 | United Airlines
        US$589 US$648
        9% off
        9% off
        US$648 US$589
      • CHI 13:00
        17h 25m
        1 stop
        YXU 14:00
        Chicago - London | Sun, Oct 11 | Normal Airline
        More cheap flights
        More cheap flights

Frequently Asked Questions

  • What are the cheapest flights from Chicago to London (CHI-YXU)?

    Based on Trip.com data, United Airlines offers one-way fares as low as US$476 on Cheapest nonstop routes (e.g. ORD to YXU on Sat, Nov 21), while United Airlines offers Cheapest nonstop round-trips from US$799 departing on Sun, Nov 1 and returning on Sun, Nov 8.
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Chicago to London is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • To find best deals on flights from Chicago to London, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Sat, Nov 21, with one-way flights priced at just US$476.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is United Airlines.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for London travel is around November.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Chicago to London is September, when demand for travel is lower.
  • After crunching the numbers on our October flight calendar, it's currently cheapest to fly from Chicago to London on October 9, 2026 with WestJet, with prices starting at US$686.
  • The time difference between London and Chicago is 1h.
  • Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.
  • Based on Trip.com data for flights departing in the next 30 days, the average one-way fare from Chicago to London is US$612. Fares vary by travel date, airline and availability.
  • Enter Chicago and London, choose your travel dates and passengers, then compare flights by price, duration and baggage. Select a fare, review the change and cancellation rules, enter traveler details and complete payment to receive your confirmation.

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Note: Prices shown on this page are the estimated lowest prices found in the last 24 hours and include all taxes and fees.

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Prices displayed on this page are all-inclusive (incl. taxes, fuel surcharges, Civil Aviation Development Fund, etc.), and all fees are clearly shown before you pay. Charges for checked baggage, onboard meals, Wi‑Fi, and other optional services are also included where applicable in the flight cards.

Real-time pricing updates

Prices, availability, and travel details on this page have been updated within the last 24 hours, and for many routes are refreshed in real time. The more popular the route, the more accurate and up-to-date the data.

Change & Cancellation Policy

Trip.com shows the change and cancellation rules for each ticket during the booking process, including all related fees and conditions. Please refer to the following scenarios:
Voluntary cancellation/change:
To request a change or cancellation, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and flight segment, and submit your request. Please note that additional charges may apply based on the airline’s fare rules.
Cancellation/change due to a flight schedule change:
If your flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For full details of change and cancellation policies, please refer to the customer support pages.