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

Return flights

28 Jul - 04 Aug	Air Canada
31 Jul - 07 Aug	jetBlue
30 Jul - 06 Aug	Air Canada
26 Jul - 02 Aug	jetBlue
29 Jul - 05 Aug	jetBlue
27 Jul - 03 Aug	Air Canada
29 Jul - 19 Aug	British Airways
25 Jul - 01 Aug	jetBlue
22 Jul - 04 Aug	Air France
09 Jul - 15 Jul	WestJet
17 Jul - 31 Jul	Air Canada
21 Jul - 06 Aug	British Airways
01 Jul - 12 Jul	WestJet

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.

Book a cheap hotel in Lisbon

Cheap car rent in Lisbon

Cheapest return flights from Washington to Lisbon in July from 803€

Return flights