United flights to Porto from $ 527*
United's most popular flights to Porto (OPO)
New York/Newark (EWR)to
Porto (OPO)San Francisco (SFO)to
Porto (OPO)Chicago (ORD)to
Porto (OPO)Denver (DEN)to
Porto (OPO)Washington, D.C. (IAD)to
Porto (OPO)Los Angeles (LAX)to
Porto (OPO)Boston (BOS)to
Porto (OPO)Seattle (SEA)to
Porto (OPO)Jackson (JAC)to
Porto (OPO)Portland, OR (PDX)to
Porto (OPO)Boise (BOI)to
Porto (OPO)Billings (BIL)to
Porto (OPO)Aspen (ASE)to
Porto (OPO)Idaho Falls (IDA)to
Porto (OPO)Eugene (EUG)to
Porto (OPO)Great Falls (GTF)to
Porto (OPO)Helena (HLN)to
Porto (OPO)Bozeman (BZN)to
Porto (OPO)Vail (EGE)to
Porto (OPO)Kalispell (FCA)to
Porto (OPO)*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.
Business class deals on flights to Porto (OPO)
New York/Newark (EWR)to
Roundtrip
Business
San Francisco (SFO)to
Roundtrip
Business
Chicago (ORD)to
Roundtrip
Business
Denver (DEN)to
Roundtrip
Business
Washington, D.C. (IAD)to
Roundtrip
Business
*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.
Find more flights to Porto (OPO) with United
From | To | Fare Type | Dates | Price |
|---|---|---|---|---|
| FromNew York/Newark (EWR) | ToPorto (OPO) | Roundtrip | Economy | 04/02/25 - 04/16/25 | from $ 696* Viewed: 14 hours ago |
| FromSan Francisco (SFO) | ToPorto (OPO) | Roundtrip | Economy | 03/11/25 - 03/18/25 | from $ 676* Viewed: 1 day ago |
| FromChicago (ORD) | ToPorto (OPO) | Roundtrip | Economy | 04/04/25 - 04/13/25 | from $ 771* Viewed: 3 hours ago |
| FromDenver (DEN) | ToPorto (OPO) | Roundtrip | Economy | 04/01/25 - 04/08/25 | from $ 686* Viewed: 5 hours ago |
| FromWashington, D.C. (IAD) | ToPorto (OPO) | Roundtrip | Economy | 04/01/25 - 04/08/25 | from $ 527* Viewed: 8 minutes ago |
| FromHouston (IAH) | ToPorto (OPO) | Roundtrip | Economy | 04/01/25 - 04/08/25 | from $ 576* Viewed: 1 day ago |
| FromLos Angeles (LAX) | ToPorto (OPO) | Roundtrip | Economy | 03/26/25 - 03/30/25 | from $ 766* Viewed: 23 minutes ago |
| FromBoston (BOS) | ToPorto (OPO) | Roundtrip | Economy | 04/01/25 - 04/08/25 | from $ 532* Viewed: 23 minutes ago |
| FromSeattle (SEA) | ToPorto (OPO) | Roundtrip | Economy | 04/01/25 - 04/08/25 | from $ 686* Viewed: 2 hours ago |
| FromJackson (JAC) | ToPorto (OPO) | Roundtrip | Economy | 03/04/25 - 03/11/25 | from $ 716* Viewed: 4 hours ago |
| FromPortland, OR (PDX) | ToPorto (OPO) | Roundtrip | Economy | 03/11/25 - 04/01/25 | from $ 708* Viewed: 4 hours ago |
| FromBoise (BOI) | ToPorto (OPO) | Roundtrip | Economy | 04/01/25 - 04/08/25 | from $ 696* Viewed: 6 hours ago |
| FromBillings (BIL) | ToPorto (OPO) | Roundtrip | Economy | 04/01/25 - 04/08/25 | from $ 606* Viewed: 6 hours ago |
| FromAspen (ASE) | ToPorto (OPO) | Roundtrip | Economy | 04/01/25 - 04/08/25 | from $ 696* Viewed: 6 hours ago |
| FromIdaho Falls (IDA) | ToPorto (OPO) | Roundtrip | Economy | 04/01/25 - 04/08/25 | from $ 701* Viewed: 3 hours ago |
| FromEugene (EUG) | ToPorto (OPO) | Roundtrip | Economy | 04/01/25 - 04/08/25 | from $ 696* Viewed: 5 hours ago |
| FromGreat Falls (GTF) | ToPorto (OPO) | Roundtrip | Economy | 02/26/25 - 03/05/25 | from $ 716* Viewed: 5 hours ago |
| FromHelena (HLN) | ToPorto (OPO) | Roundtrip | Economy | 04/01/25 - 04/08/25 | from $ 700* Viewed: 4 hours ago |
| FromBozeman (BZN) | ToPorto (OPO) | Roundtrip | Economy | 03/05/25 - 03/19/25 | from $ 626* Viewed: 5 hours ago |
| FromVail (EGE) | ToPorto (OPO) | Roundtrip | Economy | 03/25/25 - 04/01/25 | from $ 713* Viewed: 5 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.
