Cheap Flights from Chicago to London
Browse current best options from Chicago. Become a member to unlock all deals and get alerts when new deals appear.
Deals from
Chicago
RatePunk searches hundreds of travel sites at once for deals on flights to London
Prices updated 7 days ago
483 airlines compared
80%+ AI score for best value
Fares are subject to change and may not be available for all dates. (Data last updated Oct 26, 2026.)
Today’s best flight deals from Chicago to London
Explore current cheapest deals departing from Chicago to London
2026-12-08 – 2026-12-15
CHI - London
89% AI deal score
$751
$539
Round trip
2026-12-01 – 2026-12-10
CHI - London
88% AI deal score
$725
$546
Round trip
2027-02-01 – 2027-02-08
CHI - London
77% AI deal score
$615
$556
Round trip
2027-01-19 – 2027-01-25
CHI - London
80% AI deal score
$606
$558
Round trip
2027-01-17 – 2027-01-25
CHI - London
78% AI deal score
$596
$567
Round trip
2026-12-09 – 2026-12-15
CHI - London
78% AI deal score
$642
$574
Round trip
2026-12-07 – 2026-12-16
CHI - London
82% AI deal score
$707
$594
Round trip
2027-01-12 – 2027-01-19
CHI - London
77% AI deal score
$591
$595
Round trip
2027-01-08 – 2027-01-19
CHI - London
74% AI deal score
$606
$603
Round trip
2026-12-06 – 2026-12-15
CHI - London
81% AI deal score
$724
$605
Round trip