Flight price alerts: San Francisco → London
Sample round trips on this route start around EUR 643; November 2026 is often the cheapest month in our next-3-month window. FlexTrip Alerts is a free email service — set flexible travel dates and a max price, and we notify you when a round trip fits. We check fares about four times per day; we do not sell tickets.
Set a free tracker with flexible dates and your max price. We email you only when a round trip fits.
Sample fares from EUR 643. Cheapest month in our next-3-month sample: November 2026.
Set an alert and we email you when a round trip drops under your limit.
Set a price alertRound trips on this route
Cheapest-seen sample fares (next 3 months) — confirm the final price on the booking site when you click through.
Last updated .
- See deal
- Round trip · 8 nights
- Sun 22 Nov · 21:24
- Return Mon 30 Nov · 14:30
EUR 643
- See deal
- Round trip · 15 nights
- Tue 17 Nov · 16:45
- Return Wed 02 Dec · 06:40
EUR 732
- See deal
- Round trip · 14 nights
- Tue 17 Nov · 16:45
- Return Tue 01 Dec · 19:30
EUR 772
- See deal
- Round trip · 13 nights
- Wed 18 Nov · 09:15
- Return Tue 01 Dec · 20:45
EUR 843
- See deal
- Round trip · 14 nights
- Wed 18 Nov · 09:15
- Return Wed 02 Dec · 08:15
EUR 909
- See deal
- Round trip · 12 nights
- Thu 19 Nov · 08:37
- Return Tue 01 Dec · 08:10
EUR 977
- See deal
- Round trip · 13 nights
- Thu 19 Nov · 08:10
- Return Wed 02 Dec · 20:05
EUR 1048
- See deal
- Round trip · 14 nights
- Wed 23 Dec · 21:23
- Return Wed 06 Jan · 09:45
EUR 1085
- See deal
- Round trip · 23 nights
- Thu 10 Dec · 17:25
- Return Sat 02 Jan · 13:50
EUR 1313
| Depart | Return | Stay | Price | Book |
|---|---|---|---|---|
| Sun 22 Nov · 21:24 | Mon 30 Nov · 14:30 | 8 nights | EUR 643 | See deal |
| Tue 17 Nov · 16:45 | Wed 02 Dec · 06:40 | 15 nights | EUR 732 | See deal |
| Tue 17 Nov · 16:45 | Tue 01 Dec · 19:30 | 14 nights | EUR 772 | See deal |
| Wed 18 Nov · 09:15 | Tue 01 Dec · 20:45 | 13 nights | EUR 843 | See deal |
| Wed 18 Nov · 09:15 | Wed 02 Dec · 08:15 | 14 nights | EUR 909 | See deal |
| Thu 19 Nov · 08:37 | Tue 01 Dec · 08:10 | 12 nights | EUR 977 | See deal |
| Thu 19 Nov · 08:10 | Wed 02 Dec · 20:05 | 13 nights | EUR 1048 | See deal |
| Wed 23 Dec · 21:23 | Wed 06 Jan · 09:45 | 14 nights | EUR 1085 | See deal |
| Thu 10 Dec · 17:25 | Sat 02 Jan · 13:50 | 23 nights | EUR 1313 | See deal |
Frequently asked questions
- How do I get email alerts when San Francisco to London flights drop in price?
- Create a free FlexTrip Alerts tracker for San Francisco International Airport (SFO) to London (All Airports) (LON). Choose your flexible departure window, stay length, and maximum price — we email you when a round trip fits.
- Does FlexTrip Alerts book flights from San Francisco to London?
- No — we do not sell tickets. FlexTrip Alerts watches prices and emails you when a fare matches your plan. You book on the airline or travel site you prefer when you receive an alert.
- Can I set flexible travel dates for San Francisco to London alerts?
- Yes. Pick a departure window (not one fixed day) and how many nights you can stay. We match round trips that fit your window, stay length, and max price — then email you when one qualifies.
- How often does FlexTrip Alerts check San Francisco to London fares?
- We scan aggregated fares on a schedule — about four times per day (every ~6 hours, UTC). You can also trigger an on-demand check from your dashboard, with a short cooldown between manual refreshes.
- What is the cheapest month to fly from San Francisco to London?
- Based on recent fare samples on this page, November 2026 is currently the cheapest month to fly from San Francisco to London, with round trips from about EUR 643. Prices change — set an alert to catch the next drop.
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