$508 Cheap Finnair flights Chicago (ORD) to London (LHR)

View $508 flight on Sun, Jul 27, 2025Opens in a new window

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$508 Cheap Finnair flights Chicago (ORD) to London (LHR)

Prices were available within the past 7 days and start at $508 for one-way flights and $847 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Finnair
Sun, Aug 10 - Tue, Aug 26
ORD
Chicago
LHR
London
$847 Roundtrip, just found
$847
Roundtrip
just found
Select Finnair flight, departing Sun, Aug 10 from Chicago to London, returning Tue, Aug 26, priced at $847 just found
0
Flights from Chicago (ORD) to London (LHR)
Origin airport
O'Hare Intl.
Destination airport
Heathrow
Airlines serving
Aer Lingus, Air Canada, Alaska Airlines, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, JetBlue Airways, LOT-Polish Airlines, Lufthansa, Scandinavian Airlines, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United, Virgin Atlantic
Popular airline
British Airways
Distance
3942 mi

Frequently asked questions

How much is a Finnair flight from O'Hare Intl. Airport (ORD) to Heathrow Airport (LHR)?
You'll find cheap round-trip Finnair flights from $847 from ORD to LHR by organizing your results from "Price (lowest to highest)" on Expedia. Or look for deals from $508 for a one-way trip.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from ORD to LHR with Finnair?
Look for one-way or round-trip flights to London in January or February. You could find a cheap fare with Finnair during these off-peak times.
What is the cheapest time to book flights from O'Hare Intl. Airport (ORD) to Heathrow Airport (LHR) with Finnair?
To get affordable flights from ORD to LHR with Finnair, begin your search about one month before your planned departure. You can save 17% when you book your international tickets 18 to 29 days ahead instead of booking four to five months in advance. Another tip? Booking on Sunday can lead to average savings of 17% compared to Friday (the most expensive day).**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does Finnair fly nonstop from O'Hare Intl. Airport (ORD) to Heathrow Airport (LHR)?
To find out if there's a direct route from ORD to LHR with Finnair or other airlines, use our "Nonstop" filter when browsing for flights.
What is the earliest Finnair flight from ORD to LHR?
Browse Finnair's earliest flights from ORD to LHR by checking our "Morning" and "Early Morning" filters. Not only will you get to where you're going sooner, early departures also experience 20% fewer cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does Finnair fly into in London?
Finnair flights from O'Hare Intl. Airport (ORD) to London come in to Heathrow Airport (LHR). This is the main gateway to this destination.
What kind of luggage can I take on a Finnair flight from O'Hare Intl. Airport (ORD) to Heathrow Airport (LHR)?
On a standard economy flight with Finnair from ORD to LHR, you can bring 1 checked-in bag up to 50 lb with dimensions no larger than 62 inches in total. For carry-on, you can have 1 cabin bag weighing up to 22 lb and measuring less than 9 inches x 15 inches x 15 inches. Size and weight allowances can vary depending on the cabin class you're in and airfare type. To make sure you won't face additional fees at the terminal, double-check your Finnair booking or visit the airline's website before packing.
Why fly with Finnair from ORD to LHR?
Taking off from ORD to LHR with Finnair comes with a host of perks, including a 4-star airline rating and a rewarding loyalty program. Plus, when you book through Expedia, One Key™ members can earn OneKeyCash™* to use on select future travel purchases. That's in addition to the Finnair Plus points you can earn with Finnair.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my Finnair flight from O'Hare Intl. Airport (ORD) to Heathrow Airport (LHR)?
Depending on your ticket type, a fee typically applies if you cancel or reschedule your flight more than 24 hours after it's confirmed. To find tickets with more flexibility, select our "Changes included" or "No cancel fee" filter when you search for flights. For additional information on canceling or changing your reservation, go to "Trips," select your flight and tick "Manage Booking."

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*Available to One Key members.