Cheapest one-way flights from Chicago to London in March from $236

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

One-Way flights

10 Mar Frontier Airlines
24 Mar Frontier Airlines
22 Mar Frontier Airlines
21 Mar Frontier Airlines
04 Mar Air Transat
29 Mar Porter Airlines (Canada) Ltd

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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