$1,213 Cheap United flights San Francisco (SFO) to Porto (OPO)

View $1,213 flight on Thu, Jun 11, 2026Opens in a new window

$1,213 Cheap United flights San Francisco (SFO) to Porto (OPO)

Prices were available within the past 7 days and start at $1,213 for one-way flights and $1,565 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sun, Jun 14 - Fri, Jun 26
SFO
San Francisco
OPO
Porto
$1,565 Roundtrip, found 12 hours ago
$1,565
Roundtrip
found 12 hours ago
Select United flight, departing Sun, Jun 14 from San Francisco to Porto, returning Fri, Jun 26, priced at $1,565 found 12 hours ago
United
Sun, Jun 14 - Mon, Jun 29
SFO
San Francisco
OPO
Porto
$1,654 Roundtrip, found 12 hours ago
$1,654
Roundtrip
found 12 hours ago
Select United flight, departing Sun, Jun 14 from San Francisco to Porto, returning Mon, Jun 29, priced at $1,654 found 12 hours ago
United
Thu, Jun 11 - Sun, Jun 28
SFO
San Francisco
OPO
Porto
$1,729 Roundtrip, found 8 hours ago
$1,729
Roundtrip
found 8 hours ago
Select United flight, departing Thu, Jun 11 from San Francisco to Porto, returning Sun, Jun 28, priced at $1,729 found 8 hours ago

Find the cheapest month to fly from San Francisco (SFO) to Porto (OPO)

November is typically the cheapest month to fly

From $526 - $1,378 per traveler.

Travel information

Origin airport
San Francisco Intl.
Destination airport
Dr. Francisco de Sa Carneiro
Airlines serving
Air Canada, Air France, American Airlines, British Airways, Brussels Airlines, Delta, Iberia, KLM, Lufthansa, Scandinavian Airlines, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United
Popular airline
Scandinavian Airlines
Distance
8913 km

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