ExceptionalNonstop · 1.5h
SFO to LASUnited States
Las Vegas
$61
usually $155
−61%
Most monthly lows $130–$295. Cheaper than every other month on record (5).
Flights · SFO → LIS
San Francisco to Lisbon
Best fare, round trip
$1,291
Too little price history on this route to compare — the fare is shown as found.
Found
- Depart
- Mon 21 Dec
- Return
- Sun 27 Dec
- Stay
- 6 nights
- Flight
- 1 stop · 14h
- Airline
SWISS
Cached fare — the booking search re-prices live before you pay.
PortugalLisbonTiled hills, custard tarts, Atlantic light — TAP’s hub wars keep this Europe’s cheapest gateway.Best windowMar–Jun · Sep–OctAirportsHumberto Delgado (LIS)Every route into LisbonFare seasonality
When this route gets cheap.
The cheapest itinerary we are tracking makes one stop and takes about 14 hours outbound, on a 6-night trip — ticketed under SWISS, which on a connecting fare need not operate every leg. At $1,291 for 9,116 km each way, that works out to about $71 per 1,000 km flown. That is above the $44 per 1,000 km typical of long-haul fares here. Across the 12 departure cities we track at a similar distance from Lisbon, this fare ranks 12th — 2.7× the $473 we hold from Houston. For context, the middle fare among the 40 routes of similar length we watch out of San Francisco is $835. We have 1 month of cached prices for this route so far — not enough to call a fare cheap or expensive, so we publish the price without a percentage. Fare history here is still too short to name a cheap season. The best time to be in Lisbon: Mar–Jun · Sep–Oct.
The 2 days we hold a cached fare for
Press a date to compare its fares
The median cached fare across this calendar is 61% higher than when tracking began on 8 Aug — $959 then versus $1,540 now, across 21 recorded snapshots. This is a calendar-level trend, so an individual deal above can be lower. The lowest single day we have seen here is $599, on 28 Oct.
These are the only days we have a cached price for on this route so far — not the only days it flies. The search above covers any date.
Cached fares · checked 17 Oct 2026
We are still collecting this route's months — 1 month of cached prices so far, too few to chart.
Route facts
- Airports
- SFO · Oakland (OAK) · San José (SJC) ↔ Humberto Delgado (LIS)
- Flight time
- ≈14 hours outbound
- Distance
- ≈9,116 km each way
- Airlines on the board
- SWISS
- Itineraries
- Connections on current fares
- Best months to visit
- Mar–Jun · Sep–Oct
Good to know
SF → LIS, answered.
How far in advance should I book SF → Lisbon?
We do not publish a number for this, because we cannot measure it yet. Answering it honestly means watching the same departure date on this route over many weeks as it approaches, and that archive is still filling up — so any "book N days ahead" figure here would be borrowed from somewhere else rather than measured. Our guide Why flight prices change covers the levers we can measure.
Are there nonstop flights from San Francisco to Lisbon?
The current cheapest fares involve a connection, ticketed under SWISS. We hold no nonstop fare on this route right now, which does not mean none flies — search your exact dates to see what does.
Are these prices guaranteed?
No — these are cached fares found on real searches (this one on 17 October). Airlines reprice constantly, so the booking search re-checks the live price before you pay. Fresher finds are far more likely to still be available.
Next step
Sleeping in Lisbon?
Lock the flight first — then compare stays for 21–27 Dec · 6 nights.
Browse hotelsMissed it?
Cached fares expire. This route has a feed of its own — follow it and the next SF → LIS drop reaches you as soon as we find it.
Follow this route’s feedKeep browsing
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