Cheap Flights from Portland, Maine to San Francisco
No deal from Portland, Maine to San Francisco has cleared our price bar yet. What we have seen on the route is below.
Across 2 months of observations from Portland, Maine to San Francisco, the lowest round-trip fare we recorded was $394, in October. The typical fare was $430. October was the cheapest month we saw and November the dearest.
The most recent price we saw on this route was $394 on Southwest, seen Oct 31. It is an unverified observation and may have changed.
See every deal from Portland, Maine, to San Francisco, or the return direction San Francisco to Portland, Maine.
Latest price we saw: Portland, Maine to San Francisco
The most recent round-trip fare our sweep found on this route. It is not verified and may have changed since the date shown.
| From | Price | Per mile | Travel dates | Airline | Seen | Check price |
|---|---|---|---|---|---|---|
| Portland, Maine (PWM) to San Francisco (SFO) | $394 | 7.3¢ | Nov 23 – Dec 1 | Southwest | Oct 31 | Check price |
Price history: Portland, Maine to San Francisco
What we observed by month, from our signals database. Unverified observations, not bookable prices.
| Month | Low | Typical | Sightings |
|---|---|---|---|
| Nov 2026 | $435 | $435 | 2 |
| Oct 2026 | $394 | $425 | 14 |
Frequently asked questions
How many flight deals from Portland, Maine to San Francisco are on Sparkflights right now?
There are 0 verified deals from Portland, Maine to San Francisco on the board right now. The list refreshes hourly.
What is the lowest price ever seen from Portland, Maine to San Francisco?
The lowest fare we've recorded from Portland, Maine to San Francisco is $394, based on 16 price observations over 2 months.
How much does a flight from Portland, Maine to San Francisco cost?
The typical round-trip fare we observed from Portland, Maine to San Francisco is $430, against a recorded low of $394. These are observations, not quotes.
When is the cheapest month to fly Portland, Maine to San Francisco?
October was the cheapest month we observed from Portland, Maine to San Francisco and November the dearest, over 2 months of data.
What is the current price from Portland, Maine to San Francisco?
The most recent fare our sweep saw from Portland, Maine to San Francisco is $394, on Oct 31. It is an unverified observation rather than a verified deal, so check it before booking.