$429 Cheap KLM flights Chicago (ORD) to London (LHR)

View $429 flight on Tue, Nov 18, 2025Opens in a new window

$429 Cheap KLM flights Chicago (ORD) to London (LHR)

Prices were available within the past 7 days and start at $429 for one-way flights and $649 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

KLM
Wed, Nov 26 - Tue, Dec 2
ORD
Chicago
LHR
London
$649 Roundtrip, found 1 hour ago
$649
Roundtrip
found 1 hour ago
Select KLM flight, departing Wed, Nov 26 from Chicago to London, returning Tue, Dec 2, priced at $649 found 1 hour ago
KLM
Wed, Nov 26 - Tue, Dec 2
ORD
Chicago
LHR
London
$650 Roundtrip, found 1 hour ago
$650
Roundtrip
found 1 hour ago
Select KLM flight, departing Wed, Nov 26 from Chicago to London, returning Tue, Dec 2, priced at $650 found 1 hour ago
Flights from Chicago (ORD) to London (LHR)
Origin airport
O'Hare Intl.
Destination airport
Heathrow
Airlines serving
Aer Lingus, Air Canada, Air France, Alaska Airlines, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, JetBlue Airways, KLM, LOT-Polish Airlines, Lufthansa, Swiss International Air Lines, Turkish Airlines, United, Virgin Atlantic
Popular airline
Icelandair
Distance
6307 km
Average flight time
13 hours 55 mins