Cheapest one-way flights from Chicago to London in March from $176

AirHint found the following cheapest one-way flights from Chicago (ORD) to London (LGW) in March 2026 (see full year).

One-Way flights

30 Mar Frontier Airlines
24 Mar Frontier Airlines
28 Mar Spirit Airlines
29 Mar Spirit Airlines
26 Mar Frontier Airlines
23 Mar Spirit Airlines
01 Mar Frontier Airlines
14 Mar Spirit Airlines
18 Mar Spirit Airlines
27 Mar Frontier Airlines

Also check the deals for return flights from Chicago to London in March.

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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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