Cheapest return flights from Washington to Lisbon in July from $626

Best time to book flights for Washington (IAD) to Lisbon (LIS) flights at AirHint

AirHint found the following cheapest return flights from Washington (IAD) to Lisbon (LIS) in July 2025 (see full year).

Return flights

07 Jul - 16 Jul Air Canada
15 Jul - 22 Jul Aer Lingus
22 Jul - 29 Jul Aer Lingus
24 Jul - 29 Jul Icelandair
16 Jul - 23 Jul Aer Lingus
22 Jul - 14 Aug Aer Lingus
14 Jul - 21 Jul Aer Lingus
21 Jul - 14 Aug Aer Lingus
17 Jul - 22 Jul Icelandair
19 Jul - 14 Aug Aer Lingus
09 Jul - 14 Jul Royal Air Maroc
26 Jul - 04 Aug Icelandair
04 Jul - 13 Jul Icelandair
30 Jul - 04 Aug British Airways
04 Jul - 20 Jul Aer Lingus
23 Jul - 14 Aug British Airways
20 Jul - 14 Aug British Airways
24 Jul - 14 Aug Icelandair
28 Jul - 02 Aug Aer Lingus
23 Jul - 14 Aug TAP direct

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

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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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