AirHint found the following cheapest return flights from Washington (DCA) to Lisbon (LIS) in July 2026 (see full year).

Return flights

27 Jul - 03 Aug	jetBlue
28 Jul - 04 Aug	jetBlue
29 Jul - 05 Aug	jetBlue
01 Jul - 10 Jul	jetBlue
30 Jul - 06 Aug	jetBlue
09 Jul - 15 Jul	WestJet
01 Jul - 15 Jul	Air Canada
31 Jul - 07 Aug	jetBlue
02 Jul - 06 Jul	TAP
03 Jul - 26 Jul	TAP

Also check the deals for one-way flights from Washington to Lisbon 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 Washington to Lisbon in July from $1062

Return flights