AirHint found the following cheapest return flights from Detroit (DTW) to Barcelona (BCN) in July 2025 (see full year).

Return flights

01 Jul - 16 Jul	Spirit Airlines
22 Jul - 29 Jul	Spirit Airlines
06 Jul - 22 Jul	Spirit Airlines
17 Jul - 24 Jul	Spirit Airlines
11 Jul - 25 Jul	Spirit Airlines
05 Jul - 14 Jul	Frontier Airlines
31 Jul - 09 Aug	Spirit Airlines
18 Jul - 01 Aug	Spirit Airlines

Also check the deals for one-way flights from Detroit to Barcelona in July.

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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Cheapest return flights from Detroit to Barcelona in July from $687

Return flights