Flights to Porto from $ 646*
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1 Passenger, Economy
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today
today
United's most popular flights to Porto (OPO)
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flight_land
$
Newark/New York (EWR)to
Porto (OPO)06/02/26 - 06/09/26
from
$ 1,020
Viewed: 10 hours ago
Roundtrip
Economy
Chicago (ORD)to
Porto (OPO)04/28/26 - 05/05/26
from
$ 906
Viewed: 20 minutes ago
Roundtrip
Economy
Houston (IAH)to
Porto (OPO)04/28/26 - 05/05/26
from
$ 858
Viewed: 1 hour ago
Roundtrip
Economy
Los Angeles (LAX)to
Porto (OPO)07/26/26 - 07/30/26
from
$ 894
Viewed: 20 minutes ago
Roundtrip
Economy
San Francisco (SFO)to
Porto (OPO)04/28/26 - 05/05/26
from
$ 892
Viewed: 20 minutes ago
Roundtrip
Economy
Denver (DEN)to
Porto (OPO)04/28/26 - 05/05/26
from
$ 858
Viewed: 4 hours ago
Roundtrip
Economy
Washington, D.C. (IAD)to
Porto (OPO)07/26/26 - 07/30/26
from
$ 886
Viewed: 21 minutes ago
Roundtrip
Economy
Boston (BOS)to
Porto (OPO)08/10/26 - 08/25/26
from
$ 648
Viewed: 22 hours ago
Roundtrip
Economy
*Prices have been available for round trips within the last 48 hours and may not be currently available. For Economy class, fares listed may be Basic Economy, which is our most restrictive fare option and subject to additional restrictions. Additional baggage charges and fees for other optional service may apply. Other terms and conditions may apply. Schedules are subject to change without notice.
Business class deals on flights to Porto (OPO)
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flight_land
$
Newark/New York (EWR)to
Porto (OPO)
08/04/26 - 08/20/26
Roundtrip
Business
from
$ 5,065
Viewed: 5 hours ago
Chicago (ORD)to
Porto (OPO)
07/30/26 - 08/16/26
Roundtrip
Business
from
$ 5,981
Viewed: 21 minutes ago
San Francisco (SFO)to
Porto (OPO)
07/04/26 - 07/13/26
Roundtrip
Business
from
$ 5,529
Viewed: 14 hours ago
Houston (IAH)to
Porto (OPO)
08/26/26 - 09/09/26
Roundtrip
Business
from
$ 6,007
Viewed: 17 hours ago
Los Angeles (LAX)to
Porto (OPO)
06/21/26 - 07/02/26
Roundtrip
Business
from
$ 5,864
Viewed: 1 day ago
Denver (DEN)to
Porto (OPO)
06/06/26 - 06/23/26
Roundtrip
Business
from
$ 6,395
Viewed: 1 day ago
Washington, D.C. (IAD)to
Porto (OPO)
08/07/26 - 08/24/26
Roundtrip
Business
from
$ 5,369
Viewed: 22 hours ago
Boston (BOS)to
Porto (OPO)
08/10/26 - 08/25/26
Roundtrip
Business
from
$ 4,834
Viewed: 22 hours ago
*Prices have been available for round trips within the last 48 hours and may not be currently available. For Economy class, fares listed may be Basic Economy, which is our most restrictive fare option and subject to additional restrictions. Additional baggage charges and fees for other optional service may apply. Other terms and conditions may apply. Schedules are subject to change without notice.
