Cheapest return flights from Chicago to London in March from $544

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 2026 (see full year).

Return flights

11 Mar - 20 Mar Icelandair
12 Mar - 19 Mar Icelandair
03 Mar - 10 Mar Delta
10 Mar - 17 Mar Delta
11 Mar - 18 Mar Delta
11 Mar - 20 Mar American Airlines direct
18 Mar - 25 Mar Delta
04 Mar - 11 Mar Delta
09 Mar - 16 Mar Delta
02 Mar - 09 Mar Delta
25 Mar - 01 Apr Delta
27 Mar - 03 Apr Delta
26 Mar - 02 Apr Delta
30 Mar - 02 Apr Delta
31 Mar - 03 Apr Delta
29 Mar - 01 Apr Delta

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.

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