Cheap flights from Portland, Maine to San Francisco from $129
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portland, Maine to San Francisco departing on 10/28. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Fly from
Fly to
Route
Depart
Return
PortlandSan Francisco
PWM Portland - SFO San Francisco
PWMSFO
Portland
Thu 12/10
5:15 am-1:50 pm
1 stop11h 35m
San Francisco
Tue 12/15
9:25 pm-9:50 am
1 stop9h 25m
PortlandSan Francisco
PWM Portland - SFO San Francisco
PWMSFO
Portland
Wed 11/4
12:45 pm-11:55 pm
2 stops14h 10m
San Francisco
Wed 11/11
9:25 pm-10:30 am
1 stop10h 05m
PortlandSan Francisco
PWM Portland - SFO San Francisco
PWMSFO
Portland
Sat 11/14
6:00 am-7:49 pm
2 stops16h 49m
San Francisco
Mon 11/16
10:40 pm-11:58 am
1 stop10h 18m
PortlandSan Francisco
PWM Portland - SFO San Francisco
PWMSFO
Portland
Sat 11/14
6:00 am-7:49 pm
2 stops16h 49m
San Francisco
Tue 11/17
11:59 pm-1:01 pm
1 stop10h 02m
PortlandSan Francisco
PWM Portland - SFO San Francisco
PWMSFO
Portland
Wed 12/2
12:44 pm-10:11 pm
1 stop12h 27m
San Francisco
Mon 12/7
11:09 pm-10:30 am
1 stop8h 21m
PortlandSan Francisco
PWM Portland - SFO San Francisco
PWMSFO
Portland
Thu 11/12
5:45 am-12:21 pm
1 stop9h 36m
San Francisco
Tue 11/17
8:30 am-9:36 pm
1 stop10h 06m
PortlandSan Francisco
PWM Portland - SFO San Francisco
PWMSFO
Portland
Wed 11/4
8:47 am-3:35 pm
1 stop9h 48m
San Francisco
Sat 11/7
5:00 am-4:02 pm
1 stop8h 02m
PortlandSan Francisco
PWM Portland - SFO San Francisco
PWMSFO
Portland
Sat 10/31
5:08 pm-11:56 pm
1 stop9h 48m
San Francisco
Tue 11/3
9:30 pm-9:00 am
1 stop8h 30m
PortlandSan Francisco
PWM Portland - SFO San Francisco
PWMSFO
Portland
Wed 10/28
6:30 am-3:11 pm
1 stop11h 41m
San Francisco
Mon 11/16
12:24 pm-11:43 pm
1 stop8h 19m
PortlandSan Francisco
PWM Portland - SFO San Francisco
PWMSFO
Portland
Wed 10/28
6:30 am-7:34 pm
1 stop16h 04m
San Francisco
Mon 11/16
5:42 pm-10:37 am
2 stops13h 55m
See travel insights to San Francisco from
How to get the cheapest flight ticket from Portland, Maine to San Francisco
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the typical price of a round-trip flight between Portland, Maine and San Francisco?
Prices are currently low for flights on this route.
Typical prices usually range from $378 to $593.The lowest price recently found on this route was $257.
What is the cheapest month to fly to San Francisco?
If you aren’t able to travel to San Francisco during the month of November, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $415.
What is the cheapest day to depart on your flight to San Francisco?
The cheapest day to depart from Portland, Maine to San Francisco is on a Sunday when prices can be found for as low as $619. The most expensive day to fly to San Francisco is Saturday, with ticket prices averaging around $1,141.
What is the cheapest time of day to depart on your flight to San Francisco?
Our data shows that the cheapest Portland, Maine to San Francisco flights are usually those with departure times in the morning. Our users have found flights to San Francisco in the morning for as low as $612. Flights in the afternoon are often more expensive with an average ticket price of $1,141.
What is the cheapest Portland to San Francisco flight route?
Fly from Portland to San Francisco for the best Portland - San Francisco flight prices
How far in advance should I book a flight from Portland, Maine to San Francisco?
You are more likely to see cheaper flights to San Francisco from Portland, Maine when booking weeks ahead of your departure date. In general, you can expect to find flights to San Francisco for around $510 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Francisco from Portland, Maine for as low as $318 on momondo.
What cabin class options are available on Portland, Maine to San Francisco flights?
There are 2 cabin classes available to choose from on Portland, Maine to San Francisco flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Portland to San Francisco?
Delta and Southwest are the most popular carriers operating from Portland to San Francisco
What airlines fly to San Francisco?
JetBlue, United Airlines and Delta are the top three most popular airlines that fly to San Francisco from Portland, Maine according to our data. JetBlue is the first choice among our users, with 45% of people opting to fly with this airline when traveling to San Francisco. Keep in mind that there are 8 different airlines that fly to San Francisco on a routine basis, so you have a few additional options to choose from.
Which airport is the most popular layover for flights between Portland, Maine and San Francisco?
Chicago (ORD) was the most common stop: 56% of momondo users choosing 1-stop flights on this route connected there.
Which layover airport offers the lowest fares from Portland, Maine to San Francisco?
Flights via Chicago (ORD) offer the lowest average round-trip price of $285.
Which layover airport has the shortest travel time from Portland, Maine to San Francisco?
Flights connecting via Detroit (DTW) have the shortest average one-way travel time: 8h 48m.
Which layover airport has the shortest connection time from Portland, Maine to San Francisco?
Chicago (ORD) has the shortest average layover time for this route: 1h 02m.
When to book flights from Portland, Maine to San Francisco
Cheap Portland, Maine to San Francisco (PWM to SFO) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Portland, Maine to San Francisco
Frequently asked questions about flying from Portland, Maine to San Francisco
How far is Portland to San Francisco by plane?
Portland and San Francisco are 2713.5 mi apart from one another. In terms of flight time, this usually takes a little over 6h 35m.
When did momondo last update prices for flights from Portland Airport to San Francisco Airport?
Prices for flights from Portland Airport to San Francisco Airport refresh daily.
How many operators does momondo search for flights from Portland Airport to San Francisco Airport?
There are 4 operators available for flights from Portland Airport to San Francisco Airport as of October 2026.
How old do you have to be to fly from Portland Airport to San Francisco Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Portland Airport to San Francisco Airport.
What documentation or ID do you need to fly to San Francisco Airport?
The travel and health documents you'll need for your trip to San Francisco Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at San Francisco Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Portland, Maine to San Francisco?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Portland, Maine to San Francisco is Boeing 737 MAX 8 (100.00% of total bookings).
What is the most popular airline from Portland, Maine to San Francisco?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Portland, Maine to San Francisco is American Airlines (45% of total bookings). The next most popular airlines are United Airlines (32%), Delta (16%), and Southwest (7%).
Best airlines flying from Portland, Maine to San Francisco
Compare and see reviews for airlines that fly from Portland, Maine to San Francisco with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $256 | Free Cancellation | Rating 7.0 12,146 reviews | |||
| PriceFrom $276 | Free Cancellation | Rating 7.8 8,646 reviews | |||
| PriceFrom $286 | Free Cancellation | Rating 7.4 10,322 reviews | |||
| PriceFrom $416 | Free Cancellation | Rating 7.9 4,224 reviews |
United Airlines Flights From Portland, Maine to San Francisco
The lowest priced United Airlines flight from Portland, Maine to San Francisco from the last 72 hours was $286. Generally, United Airlines has 3 flights on this route every week with an average price of $554. United Airlines is rated 7.4/10 by our users.
Traveling to a place near San Francisco?
Book flights to San Francisco if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Portland to San Francisco?
We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Portland to San Francisco for you.
Can I find flights from Portland to San Francisco with flexible booking policies on momondo?
Yes. All flights to San Francisco from Portland on momondo can be compared and filtered by various policies on offer, including flexible booking.
How can momondo help me find flights from Portland to San Francisco?
Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to San Francisco from Portland.
I’m not ready to book a flight from Portland to San Francisco right now. Can momondo alert me if prices change?
If you are not ready to book a flight from Portland to San Francisco now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to San Francisco and let you know when they change.