AirHint found the following cheapest return flights from Washington (IAD) to Lisbon (LIS)
in May 2025 (see full year ).
Return flights
18 May
- 23 May
Air Canada
$ 673
06 May
- 14 May
Turkish Airlines
$ 675
07 May
- 13 May
Turkish Airlines
$ 675
06 May
- 15 May
Turkish Airlines
$ 675
27 May
- 03 Jun
Porter Airlines (Canada) Ltd
$ 675
14 May
- 21 May
Turkish Airlines
$ 676
02 May
- 09 May
British Airways
$ 677
29 May
- 03 Jun
Porter Airlines (Canada) Ltd
$ 696
20 May
- 29 May
Air Transat
$ 702
20 May
- 24 May
Air Transat
$ 703
01 May
- 08 May
Turkish Airlines
$ 711
07 May
- 14 May
Turkish Airlines
$ 711
29 May
- 08 Jun
Porter Airlines (Canada) Ltd
$ 733
31 May
- 09 Jun
Air Canada
$ 745
26 May
- 02 Jun
Porter Airlines (Canada) Ltd
$ 751
21 May
- 04 Jun
Porter Airlines (Canada) Ltd
$ 814
28 May
- 04 Jun
Porter Airlines (Canada) Ltd
$ 916
27 May
- 03 Jun
TAP
$ 936
direct
31 May
- 07 Jun
Aer Lingus
$ 964
31 May
- 09 Jun
TAP
$ 1010
direct
Also check the deals for one-way flights from Washington to Lisbon in May .
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.
