Flight price alerts: London → San Francisco
Sample round trips on this route start around EUR 545; 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 545. 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 · 27 nights
- Fri 13 Nov · 14:45
- Return Thu 10 Dec · 12:39
EUR 545
- See deal
- Round trip · 2 nights
- Fri 20 Nov · 14:45
- Return Sun 22 Nov · 06:08
EUR 558
- See deal
- Round trip · 10 nights
- Mon 23 Nov · 14:45
- Return Thu 03 Dec · 10:40
EUR 561
- See deal
- Round trip · 6 nights
- Tue 24 Nov · 16:35
- Return Mon 30 Nov · 16:35
EUR 692
- See deal
- Round trip · 12 nights
- Fri 11 Dec · 09:50
- Return Wed 23 Dec · 17:20
EUR 723
- See deal
- Round trip · 11 nights
- Fri 11 Dec · 17:50
- Return Tue 22 Dec · 15:10
EUR 746
- See deal
- Round trip · 9 nights
- Fri 11 Dec · 16:55
- Return Sun 20 Dec · 17:25
EUR 800
- See deal
- Round trip · 5 nights
- Sat 19 Dec · 17:00
- Return Thu 24 Dec · 16:45
EUR 865
- See deal
- Round trip · 11 nights
- Thu 10 Dec · 10:05
- Return Mon 21 Dec · 19:15
EUR 926
- See deal
- Round trip · 10 nights
- Fri 11 Dec · 16:55
- Return Mon 21 Dec · 19:15
EUR 926
- See deal
- Round trip · 7 nights
- Sun 27 Dec · 09:30
- Return Sun 03 Jan · 21:40
EUR 979
- See deal
- Round trip · 15 nights
- Fri 18 Dec · 16:55
- Return Sat 02 Jan · 05:30
EUR 1012
- See deal
- Round trip · 6 nights
- Sat 02 Jan · 15:40
- Return Fri 08 Jan · 17:25
EUR 1291
- See deal
- Round trip · 1 night
- Mon 21 Dec · 06:00
- Return Tue 22 Dec · 21:46
EUR 1368
- See deal
- Round trip · 1 night
- Sun 20 Dec · 06:00
- Return Mon 21 Dec · 17:39
EUR 1643
| Depart | Return | Stay | Price | Book |
|---|---|---|---|---|
| Fri 13 Nov · 14:45 | Thu 10 Dec · 12:39 | 27 nights | EUR 545 | See deal |
| Fri 20 Nov · 14:45 | Sun 22 Nov · 06:08 | 2 nights | EUR 558 | See deal |
| Mon 23 Nov · 14:45 | Thu 03 Dec · 10:40 | 10 nights | EUR 561 | See deal |
| Tue 24 Nov · 16:35 | Mon 30 Nov · 16:35 | 6 nights | EUR 692 | See deal |
| Fri 11 Dec · 09:50 | Wed 23 Dec · 17:20 | 12 nights | EUR 723 | See deal |
| Fri 11 Dec · 17:50 | Tue 22 Dec · 15:10 | 11 nights | EUR 746 | See deal |
| Fri 11 Dec · 16:55 | Sun 20 Dec · 17:25 | 9 nights | EUR 800 | See deal |
| Sat 19 Dec · 17:00 | Thu 24 Dec · 16:45 | 5 nights | EUR 865 | See deal |
| Thu 10 Dec · 10:05 | Mon 21 Dec · 19:15 | 11 nights | EUR 926 | See deal |
| Fri 11 Dec · 16:55 | Mon 21 Dec · 19:15 | 10 nights | EUR 926 | See deal |
| Sun 27 Dec · 09:30 | Sun 03 Jan · 21:40 | 7 nights | EUR 979 | See deal |
| Fri 18 Dec · 16:55 | Sat 02 Jan · 05:30 | 15 nights | EUR 1012 | See deal |
| Sat 02 Jan · 15:40 | Fri 08 Jan · 17:25 | 6 nights | EUR 1291 | See deal |
| Mon 21 Dec · 06:00 | Tue 22 Dec · 21:46 | 1 night | EUR 1368 | See deal |
| Sun 20 Dec · 06:00 | Mon 21 Dec · 17:39 | 1 night | EUR 1643 | See deal |
Frequently asked questions
- How do I get email alerts when London to San Francisco flights drop in price?
- Create a free FlexTrip Alerts tracker for London (All Airports) (LON) to San Francisco International Airport (SFO). Choose your flexible departure window, stay length, and maximum price — we email you when a round trip fits.
- Does FlexTrip Alerts book flights from London to San Francisco?
- 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 London to San Francisco 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 London to San Francisco 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 London to San Francisco?
- Based on recent fare samples on this page, November 2026 is currently the cheapest month to fly from London to San Francisco, with round trips from about EUR 545. Prices change — set an alert to catch the next drop.
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