Flights from Lisbon to San Francisco
Book this route, and I keep checking the price. If it falls before you fly, I buy the cheaper seat and send you the difference.
Cheapest return I can find today
€702about $808
One traveller, economy, LIS → SFO, out 19 September 2026 and back 26 September 2026. Checked within the last 24 hours. Fares move — this is what it cost when I last looked, not a guarantee.
Flown by Iberia, British Airways, Duffel Airways, American Airlines, Lufthansa, SAS.
Why this route is worth watching
Lisbon to San Francisco is booked well ahead, and the fare keeps moving after you buy. That gap is the whole point: about 1 in 3 flights get cheaper after purchase, and the money is normally the airline's to keep. I check your price every few hours for as long as you hold the ticket, and if a cheaper seat appears I buy it before cancelling the old one, so you are never left without a seat.
Some fares cannot be changed at all. I tell you which before you buy, rather than after.