Washington (IAD) to Porto (OPO) flight deal in economy from $345

Air CanadaACAir CanadaLufthansaLHLufthansaSwiss International Air LinesLXSwiss International Air LinesAustrian AirlinesOSAustrian AirlinesUnited AirlinesUAUnited Airlines
One Way•Economy
United StatesIAD

Washington Dulles International Airport

Washington, United States
PortugalOPO

Francisco Sá Carneiro Airport

Porto, Portugal
$443 USD
-22%$345 USD
Verified 18 days ago
Fair Availability
36% of dates checked are available within 10% of the lowest price

Tuesday, October 13th, 2026

Outbound Flights

10h 15m·1 stop
$462 USD
Air Canada
IADOct 13 15:45
→
YULOct 13 17:23
AC 8726Embraer 175
1h 57m layover
Air Canada
YULOct 13 19:20
→
OPOOct 14 07:00
AC 928Airbus A321neo
17h 45m·2 stops
$462 USD
United Airlines
IADOct 13 08:15
→
YOWOct 13 09:56
UA 3629Embraer 175
4h 39m layover
Air Canada
YOWOct 13 14:35
→
YULOct 13 15:23
AC 478Airbus A320
3h 57m layover
Air Canada
YULOct 13 19:20
→
OPOOct 14 07:00
AC 928Airbus A321neo
17h 45m·2 stops
$462 USD
United Airlines
IADOct 13 08:15
→
YOWOct 13 09:56
UA 3629Embraer 175
5h 14m layover
Air Canada
YOWOct 13 15:10
→
YULOct 13 15:58
AC 8010Canadair RJ 900
3h 22m layover
Air Canada
YULOct 13 19:20
→
OPOOct 14 07:00
AC 928Airbus A321neo
17h 45m·2 stops
$462 USD
United Airlines
IADOct 13 08:15
→
YOWOct 13 09:56
UA 3629Embraer 175
1h 19m layover
Air Canada
YOWOct 13 11:15
→
YULOct 13 12:01
AC 476Airbus A320
7h 19m layover
Air Canada
YULOct 13 19:20
→
OPOOct 14 07:00
AC 928Airbus A321neo
10h 55m·1 stop
$463 USD
United Airlines
IADOct 13 17:50
→
EWROct 13 19:20
UA 1831Boeing 737
2h 30m layover
United Airlines
EWROct 13 21:50
→
OPOOct 14 09:45
UA 144Boeing 757
20h 5m·1 stop
$466 USD
Lufthansa
IADOct 13 22:20
→
MUCOct 14 12:30
LH 415Airbus A380
8h 55m layover
Lufthansa
MUCOct 14 21:25
→
OPOOct 14 23:25
LH 1788Airbus A321neo
16h 15m·1 stop
$468 USD
Swiss International Air Lines
IADOct 13 20:20
→
ZRHOct 14 10:25
LX 73Airbus A330
5h 25m layover
Swiss International Air Lines
ZRHOct 14 15:50
→
OPOOct 14 17:35
LX 2064Airbus A220-300 Passenger
14h 30m·2 stops
$475 USD
United Airlines
IADOct 13 22:05
→
LHROct 14 10:40
UA 924Boeing 767
1h 30m layover
Swiss International Air Lines
LHROct 14 12:10
→
ZRHOct 14 14:50
LX 319Airbus A220-300 Passenger
1h layover
Swiss International Air Lines
ZRHOct 14 15:50
→
OPOOct 14 17:35
LX 2064Airbus A220-300 Passenger
12h 15m·1 stop
$478 USD
Lufthansa
IADOct 13 17:55
→
FRAOct 14 07:55
LH 419Airbus A340
1h 25m layover
Lufthansa
FRAOct 14 09:20
→
OPOOct 14 11:10
LH 1176Airbus A321
13h 17m·1 stop
$521 USD
United Airlines
IADOct 13 12:43
→
YULOct 13 14:40
UA 3539Embraer 175
4h 40m layover
Air Canada
YULOct 13 19:20
→
OPOOct 14 07:00
AC 928Airbus A321neo
12h 40m·1 stop
$578 USD
United Airlines
IADOct 13 17:45
→
ZRHOct 14 08:05
UA 52Boeing 767
1h 40m layover
Swiss International Air Lines
ZRHOct 14 09:45
→
OPOOct 14 11:25
LX 2066Airbus A321neo
12h 45m·1 stop
$831 USD
United Airlines
IADOct 13 17:25
→
FRAOct 14 07:20
UA 989Boeing 777
2h layover
Lufthansa
FRAOct 14 09:20
→
OPOOct 14 11:10
LH 1176Airbus A321
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