$404 Find Cheap Flights from Portugal to San Francisco - Compare and Save

In the last 5 days, the cheapest flight deal to San Francisco was found on the route from Porto, at $622 return. The most popular connection is from Lisbon to San Francisco and KAYAK users have found round-trip deals for as low as $622 in the last 5 days.

Based on KAYAK data, the cheapest day to fly to San Francisco is Friday where round-trip tickets can be as cheap as $813. On the other hand, the most expensive day to fly is Monday, where round-trip prices are $1,885 on average.

The cheapest month for flights to San Francisco is September, where tickets cost $250 on average for return flights. On the other hand, the most expensive months are June and April, where the average cost of tickets from Portugal is $707 and $651 respectively. For one-way flights, the best month to travel is April with an average price of $315.

The cheapest time of day to fly to San Francisco is generally in the morning, when round-trip flights cost $873 on average. The most expensive time of day to fly to San Francisco is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $957.

If you’re looking for cheap airfare to San Francisco, 25% of our users found tickets to San Francisco for the following prices or less: From Lisbon $1,182 round-trip.

To get a below average price, you should book around 3 weeks before departure, which saves you about 5% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 21 weeks before departure.

The duration of your flight to San Francisco depends on your departure and arrival airports. Obviously, any flights that include a layover will also be longer. The most popular routes to San Francisco on KAYAK are from Lisbon, which takes 12h 25m, Porto, which takes 14h 45m, and Funchal, which takes 19h 45m.

There are around 1,999 direct flights from within Portugal to San Francisco every day. Most flights depart in the morning, with 41% of flights departing in the morning.

There are not any medium-haul (3-6 hour flight duration) or short-haul (up to 3 hour flight duration) flights to San Francisco. Instead, there are 13 long-haul flights (6-12 hour flight duration), with the most arriving from Lisbon.

From Portugal, there are direct flights to San Francisco from 2 cities. The city with the most direct flights is Lisbon, with 11 direct flights each week.