Flights from Boise to to Portugal from $ 449*
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1 Passenger, Economy
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Find United's best fares from Boise to to Portugal
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Boise (BOI)to
Lisbon (LIS)02/24/26 - 03/03/26from$Â 459Viewed: 21 hours agoRoundtripEconomy
Boise (BOI)to
Porto (OPO)03/03/26 - 03/10/26from$Â 449Viewed: 12 hours agoRoundtripEconomy
*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 flights from Boise to to Portugal
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Boise (BOI)to
Lisbon (LIS)
06/16/26 - 06/30/26
Roundtrip
Business
from
$Â 4,894
Viewed: 18 hours ago
Boise (BOI)to
Porto (OPO)
12/27/25 - 01/03/26
Roundtrip
Business
from
$Â 9,742
Viewed: 19 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.