United & SWISS are selling cheap flights from San Francisco, United States to Lisbon, Portugal for as low as $333 return! That works out to a cost of just 2.9 Cents Per Mile for this 11300 mile journey.

The fare only includes carry-on luggage, so you need to pay extra if you want to check bags.

Our data shows the lowest prices are available in December 2021. See the link(s) below for dates and prices.

Sample date(s) with Kiwi.com booking link

Jul 21 – Jul 27 ($404)


Jul 22 – Jul 30 ($380)


Jul 22 – Jul 31 ($531)


Aug 2 – Aug 7 ($390)


Aug 14 – Aug 26 ($415)


Aug 17 – Aug 28 ($339)


Aug 19 – Aug 26 ($337)


Nov 11 – Nov 18 ($334)


Dec 2 – Dec 9 ($333)


Feb 9 – Feb 16 ($336)

Are you looking for an apartment to rent for your stay in Lisbon, Portugal? Check out what Vrbo.com has to offer!

We post many cheap flights like this one from San Francisco, United States to Lisbon, Portugal every single day, so have a look at our Travel Deals page, or check out the related posts below!

Note: Prices are valid at the time of publishing this post, but may change in the future.

COVID-19 Note: During these uncertain times, please make sure to check the relevant Coronavirus restrictions for your destination before you book and before you fly. We recommend also checking the refund policy of the airline, as well as purchasing travel insurance for your trip.