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Cheap flights from Portland, Maine to San Antonio from $135

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 Antonio departing on 1/27. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Portland, Maine to San Antonio

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
1:42 pm - 9:38 pmPWM  Portland-SAT San Antonio
8h 56m1 stop Charlotte Douglas
American Airlines Logo
3:02 pm - 11:47 pmSAT  San Antonio-PWM Portland
7h 45m1 stop Chicago O'Hare Intl
$269American Airlines
to., sep. 10 - on., sep. 16
Southwest Logo
3:25 pm - 9:20 pmPWM  Portland-SAT San Antonio
6h 55m1 stop Baltimore/Washington
Southwest Logo
5:30 am - 12:10 pmSAT  San Antonio-PWM Portland
5h 40m1 stop Baltimore/Washington
$269Southwest
on., nov. 11 - on., nov. 18
United Airlines Logo
4:48 pm - 10:58 pmPWM  Portland-SAT San Antonio
7h 10m1 stop Chicago O'Hare Intl
United Airlines Logo
6:43 am - 1:52 pmSAT  San Antonio-PWM Portland
6h 09m1 stop Chicago O'Hare Intl
$269United Airlines
ti., feb. 2 - lø., feb. 6
American Airlines Logo
7:28 am - 1:05 pmPWM  Portland-SAT San Antonio
6h 37m1 stop Philadelphia
American Airlines Logo
7:05 am - 2:21 pmSAT  San Antonio-PWM Portland
6h 16m1 stop Philadelphia
$271American Airlines
to., sep. 3 - ma., sep. 7
Southwest Logo
12:45 pm - 9:40 pmPWM  Portland-SAT San Antonio
9h 55m2 stops Baltimore/Washington Denver Intl
Southwest Logo
5:30 am - 2:45 pmSAT  San Antonio-PWM Portland
8h 15m1 stop Baltimore/Washington
$274Southwest
on., nov. 11 - on., nov. 18
American Airlines Logo
12:46 pm - 8:32 pmPWM  Portland-SAT San Antonio
8h 46m1 stop Washington, D.C. Reagan-National
American Airlines Logo
12:45 pm - 11:40 pmSAT  San Antonio-PWM Portland
9h 55m2 stops Dallas/Fort Worth Washington, D.C. Reagan-National
$274American Airlines
ti., feb. 2 - lø., feb. 6
Delta Logo
6:00 am - 11:57 amPWM  Portland-SAT San Antonio
6h 57m1 stop New York John F Kennedy Intl
Delta Logo
1:46 pm - 10:23 pmSAT  San Antonio-PWM Portland
7h 37m1 stop Atlanta Hartsfield-Jackson
$277Delta
to., des. 3 - ma., des. 7
Delta Logo
4:47 pm - 10:20 pmPWM  Portland-SAT San Antonio
6h 33m1 stop Detroit Metropolitan Wayne County
Delta Logo
1:46 pm - 11:33 pmSAT  San Antonio-PWM Portland
8h 47m1 stop Atlanta Hartsfield-Jackson
$277Delta
ma., nov. 2 - ti., nov. 10
United Airlines Logo
6:00 am - 11:41 amPWM  Portland-SAT San Antonio
6h 41m1 stop Newark
United Airlines Logo
6:00 am - 1:51 pmSAT  San Antonio-PWM Portland
6h 51m1 stop Newark
$343United Airlines
ma., sep. 28 - on., sep. 30
Breeze Airways Logo
7:00 am - 10:50 amPWM  Portland-SAT San Antonio
28h 50m3 stops Akron/Canton Raleigh-Durham Memphis
Breeze Airways Logo
11:30 am - 2:31 pmSAT  San Antonio-PWM Portland
26h 01m3 stops Memphis Raleigh-Durham Pittsburgh
$994Breeze Airways
to., sep. 3 - ma., sep. 7

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Delta flights from Portland, Maine to San Antonio

Our best Delta deals on Portland, Maine to San Antonio flight tickets
Delta
Nov 2
PWM4:47 pmPortland
6h 33m
1 stop
SAT10:20 pmSan Antonio
Nov 10
SAT1:46 pmSan Antonio
9h 09m
2 stops
PWM11:55 pmPortland
$282
Delta
Dec 3
PWM6:00 amPortland
12h 43m
2 stops
SAT5:43 pmSan Antonio
Dec 7
SAT1:46 pmSan Antonio
8h 35m
2 stops
PWM11:21 pmPortland
$288
Delta
Sep 3
PWM1:12 pmPortland
12h 16m
2 stops
SAT12:28 amSan Antonio
Sep 7
SAT2:43 pmSan Antonio
7h 30m
1 stop
PWM11:13 pmPortland
$404

American Airlines flights from Portland, Maine to San Antonio

Our best American Airlines deals on Portland, Maine to San Antonio flight tickets
American Airlines
Sep 10
PWM1:42 pmPortland
8h 56m
1 stop
SAT9:38 pmSan Antonio
Sep 16
SAT3:02 pmSan Antonio
7h 45m
1 stop
PWM11:47 pmPortland
$269
American Airlines
Sep 10
PWM1:42 pmPortland
9h 17m
2 stops
SAT9:59 pmSan Antonio
Sep 16
SAT12:15 pmSan Antonio
8h 58m
1 stop
PWM10:13 pmPortland
$274
American Airlines
Sep 3
PWM7:28 amPortland
6h 37m
1 stop
SAT1:05 pmSan Antonio
Sep 7
SAT7:05 amSan Antonio
6h 16m
1 stop
PWM2:21 pmPortland
$277

momondo Fare Finder

 
Customize your flight search to find flights from Portland, Maine to San Antonio that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated august 13, 2026.
Use the filters below to find and compare flights from Portland, Maine to San Antonio that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandSan Antonio

PWM Portland - SAT San Antonio

PWMSAT

Portland

to. 9/10

1:42 pm-9:38 pm

1 stop8h 56m

San Antonio

on. 9/16

3:02 pm-11:47 pm

1 stop7h 45m

$269
Quickest round-trip

PortlandSan Antonio

PWM Portland - SAT San Antonio

PWMSAT

Portland

on. 11/11

3:25 pm-9:20 pm

1 stop6h 55m

San Antonio

on. 11/18

5:30 am-12:10 pm

1 stop5h 40m

$269

PortlandSan Antonio

PWM Portland - SAT San Antonio

PWMSAT

Portland

ti. 2/2

4:48 pm-10:58 pm

1 stop7h 10m

San Antonio

lø. 2/6

6:43 am-1:52 pm

1 stop6h 09m

$269

PortlandSan Antonio

PWM Portland - SAT San Antonio

PWMSAT

Portland

to. 9/3

7:28 am-1:05 pm

1 stop6h 37m

San Antonio

ma. 9/7

7:05 am-2:21 pm

1 stop6h 16m

$271

PortlandSan Antonio

PWM Portland - SAT San Antonio

PWMSAT

Portland

on. 11/11

12:45 pm-9:40 pm

2 stops9h 55m

San Antonio

on. 11/18

5:30 am-2:45 pm

1 stop8h 15m

$274

PortlandSan Antonio

PWM Portland - SAT San Antonio

PWMSAT

Portland

ti. 2/2

12:46 pm-8:32 pm

1 stop8h 46m

San Antonio

lø. 2/6

12:45 pm-11:40 pm

2 stops9h 55m

$274

PortlandSan Antonio

PWM Portland - SAT San Antonio

PWMSAT

Portland

to. 12/3

6:00 am-11:57 am

1 stop6h 57m

San Antonio

ma. 12/7

1:46 pm-10:23 pm

1 stop7h 37m

$277

PortlandSan Antonio

PWM Portland - SAT San Antonio

PWMSAT

Portland

ma. 11/2

4:47 pm-10:20 pm

1 stop6h 33m

San Antonio

ti. 11/10

1:46 pm-11:33 pm

1 stop8h 47m

$277

PortlandSan Antonio

PWM Portland - SAT San Antonio

PWMSAT

Portland

ma. 9/28

6:00 am-11:41 am

1 stop6h 41m

San Antonio

on. 9/30

6:00 am-1:51 pm

1 stop6h 51m

$343

PortlandSan Antonio

PWM Portland - SAT San Antonio

PWMSAT

Portland

to. 9/3

7:00 am-10:50 am

3 stops28h 50m

San Antonio

ma. 9/7

11:30 am-2:31 pm

3 stops26h 01m

$994

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to San Antonio from

How to get the cheapest flight ticket from Portland, Maine to San Antonio

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 cheapest month to fly to San Antonio?

If you aren’t able to travel during the month of August, then book flights to San Antonio from Portland, Maine during October instead. Flights to San Antonio in October, while not as cheap as those in August, still average around $406.

Can stopping save me money on Portland, Maine to San Antonio flights?

You could potentially save up to 22% on your flight if you consider stops on a Portland, Maine to San Antonio flight.

How have Portland, Maine to San Antonio flight prices changed over time?

When to book flights from Portland, Maine to San Antonio

Are you open to changing your travel dates? Check out the ideal times to fly from Portland, Maine to San Antonio according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Portland, Maine to San Antonio (PWM to SAT) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portland, Maine to San Antonio

Fastest flight time

6h 23m

Direct flights

None
The fastest flight from Portland, Maine to San Antonio takes 6h 23m
There are no direct flights from Portland, Maine to San Antonio. There are no popular flight routes from Portland, Maine to San Antonio.
Search flight deals

Frequently asked questions about flying from Portland, Maine to San Antonio

  • How far is Portland to San Antonio by plane?

    The distance between Portland and San Antonio is about 1835.4 mi. In terms of flight time, this usually takes a little over 6h 23m.

  • When did momondo last update prices for flights from Portland Airport to San Antonio Airport?

    Prices for flights from Portland Airport to San Antonio Airport refresh daily.

  • How many operators does momondo search for flights from Portland Airport to San Antonio Airport?

  • How old do you have to be to fly from Portland Airport to San Antonio 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 Antonio Airport.

  • What documentation or ID do you need to fly to San Antonio Airport?

    The travel and health documents you'll need for your trip to San Antonio 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 Antonio Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Portland, Maine to San Antonio?

Best airlines flying from Portland, Maine to San Antonio

Compare and see reviews for airlines that fly from Portland, Maine to San Antonio with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $263Free CancellationRating
7.4
10,112 reviews
Search United Airlines flights
DeltaPriceFrom $279Free CancellationRating
7.8
8,502 reviews
Search Delta flights
American AirlinesPriceFrom $281Free CancellationRating
7.1
11,923 reviews
Search American Airlines flights
SouthwestPriceFrom $324Free CancellationRating
8.0
4,219 reviews
Search Southwest flights

Traveling to a place near San Antonio?

Book flights to San Antonio if you plan to visit one of these locations
New Braunfels
Pleasanton
Kerrville
Boerne
Schertz

Why use momondo?

Why should I use momondo to find a flight deal from Portland to San Antonio?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Portland to San Antonio. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Portland to San Antonio with flexible booking policies on momondo?

All flight searches from Portland to San Antonio on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Portland to San Antonio?

momondo provides multiple filters to help you find the best flight to San Antonio from Portland. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Portland to San Antonio right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to San Antonio from Portland. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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