Cheapest return flights from Chicago to London in March from $462

Best time to book flights for Chicago (ORD) to London (LHR) flights at AirHint

AirHint found the following cheapest return flights from Chicago (ORD) to London (LHR) in March 2025 (see full year).

Return flights

03 Mar - 29 Apr Icelandair
26 Mar - 08 Apr Icelandair
03 Mar - 10 Mar Icelandair
11 Mar - 18 Mar Icelandair
17 Mar - 24 Mar Icelandair
30 Mar - 08 Apr Icelandair
04 Mar - 11 Mar Icelandair
11 Mar - 19 Mar Icelandair
02 Mar - 06 Mar Icelandair
09 Mar - 13 Mar Icelandair
02 Mar - 11 Mar Icelandair
17 Mar - 25 Mar Icelandair
10 Mar - 25 Mar Icelandair
31 Mar - 08 Apr Icelandair
26 Mar - 02 Apr Icelandair
26 Mar - 02 Apr Finnair direct
30 Mar - 08 Apr Finnair direct
23 Mar - 08 Apr Finnair
23 Mar - 01 Apr Finnair
31 Mar - 08 Apr Iberia direct

Also check the deals for one-way flights from Chicago to London in March.

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

Book a cheap hotel in London

Cheap car rent in London