One route, followed properly: Madrid (MAD) to San Francisco (SFO), return. What follows is the lowest fare our radar has picked up on it and the precise dates behind that number, rather than a headline price with the conditions left out.
We do not post a price and leave it to age. Each fare is re-checked against Skyscanner on a schedule and carries the time it was last confirmed. Not flying from Madrid? We track 47 other departure cities for San Francisco, listed at the foot of this page.
Madrid → San Francisco
for 1 Sep – 16 Sep 2026
✓ live-checked 57 minutes ago
Check live price on Skyscanner →Price history 44 checks recorded for this route
lowest seen €442 · typical €645 · highest €1,283 · now €521
The cheapest Madrid to San Francisco return flight on the radar right now is €521, flying with TAP Air Portugal via one or more connections. It covers departures in September 2026, and every dated link below opens that exact MAD–SFO search on Skyscanner. That is roughly 19% below the €645 this route usually costs. Across 44 recorded checks it has ranged between €442 and €1,283. Our sampling points to September 2026 as the cheapest month to fly Madrid to San Francisco.
Madrid to San Francisco flights: common questions
How much is a flight from Madrid to San Francisco?
The lowest return fare we currently track from Madrid (MAD) to San Francisco (SFO) is €521. The typical price on this route is €645, so anything near €521 is worth booking quickly. Over 44 recorded checks we have seen it as low as €442 and as high as €1,283.
Which airline flies from Madrid to San Francisco at this price?
This €521 fare is with TAP Air Portugal, with at least one connection. The live search lists every carrier serving the route, so you can compare schedules before booking.
Is there a direct flight from Madrid to San Francisco?
This €521 fare includes at least one connection. If you need a non-stop Madrid to San Francisco flight, open the live search and apply the direct filter there.
When is the cheapest time to fly from Madrid to San Francisco?
Our price sampling points to September 2026 as the cheapest departure month on this route. The dated links on this page cover September 2026.
Is the €521 Madrid to San Francisco fare still available?
We last confirmed this €521 fare against live Skyscanner availability 57 minutes ago. Deal fares move within days, so the Check live price button re-runs the exact search and shows today's number rather than a cached one.
How do I book this Madrid to San Francisco deal?
Pick a date pair above or press Check live price. That opens the exact MAD–SFO search on Skyscanner, where you book directly with the airline or agent. TravelFree does not sell tickets, adds no booking fee and does not mark the price up.
Every Madrid to San Francisco price on this page comes from a real bookable quote and is re-checked automatically. TravelFree takes no commission from you and never marks a fare up.
Cheap fares do not hang around. If this one has already gone, nudge the dates either way by a day or two; Madrid to San Francisco is usually still decent value around the same window.