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$183+ Cheap flights from Portland, ME to San Antonio (PWM - SAT)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/9. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — SAT
feb. 26 — mar. 51
jue. 2/26
jue. 3/5
1 adult, Economy
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Cheap flight deals from Portland to San Antonio

Cheapest flights from Portland to San Antonio
Explore the most affordable flight options available from Portland to San Antonio. Find the lowest fares from popular airlines and budget airlines, with prices last updated on enero 27, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 4/611:29 am
PWM
-
SAT
2 stops25h 58m
Multiple Airlines
jue. 4/91:22 pm
SAT
-
PWM
1 stop18h 45m
Multiple Airlines
Deal found 1/26$326
This Southwest deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 2/243:30 pm
PWM
-
SAT
2 stops8h 35m
Southwest
sáb. 2/285:30 am
SAT
-
PWM
1 stop6h 55m
Southwest
Deal found 1/26$353
This United Airlines deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 2/244:15 pm
PWM
-
SAT
1 stop7h 57m
United Airlines
sáb. 2/287:05 am
SAT
-
PWM
1 stop6h 18m
United Airlines
Deal found 1/26$356
This Southwest deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 3/104:30 pm
PWM
-
SAT
1 stop7h 00m
Southwest
mar. 3/314:20 pm
SAT
-
PWM
1 stop5h 45m
Southwest
Deal found 1/26$367
This Delta deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 3/104:48 pm
PWM
-
SAT
2 stops8h 50m
Delta
mar. 3/175:10 am
SAT
-
PWM
1 stop5h 59m
Delta
Deal found 1/27$372
This Southwest deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 4/65:30 pm
PWM
-
SAT
1 stop6h 30m
Southwest
jue. 4/94:30 pm
SAT
-
PWM
1 stop5h 55m
Southwest
Deal found 1/26$380
This Southwest deal was found by Cheapflights users on 1/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 3/312:45 pm
PWM
-
SAT
1 stop9h 25m
Southwest
vie. 3/65:00 am
SAT
-
PWM
1 stop5h 55m
Southwest
Deal found 1/25$382
This Delta deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 5/24:42 pm
PWM
-
SAT
2 stops8h 48m
Delta
jue. 5/75:30 am
SAT
-
PWM
2 stops9h 45m
Delta
Deal found 1/26$391

Find flight deals from Portland to San Antonio

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PWM) to San Antonio (SAT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated enero 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$326
(Kiwi.com)

One-way from

$183
(Kiwi.com)

Popular in

April

Cheapest in

July

Average price

$496
Provider with most accurate pricing for Portland-San Antonio flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-San Antonio flights.
Search Deals
From Portland to San Antonio
Search Deals
One-way flight from Portland to San Antonio
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($54 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portland 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, Cheapflights users made 2,558,603 searches. Data last updated enero 27, 2026.
Use the filters below to find and compare flights from Portland to San Antonio that are best for you.

Fly from

Portland

Fly to

San Antonio

Route

Depart

Return

Price

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

lun. 4/6

11:29 am-12:27 pm

2 stops25h 58m

San Antonio

jue. 4/9

1:22 pm-9:07 am

1 stop18h 45m

$326

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

mar. 2/24

3:30 pm-11:05 pm

2 stops8h 35m

San Antonio

sáb. 2/28

5:30 am-1:25 pm

1 stop6h 55m

$353

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

mar. 2/24

4:15 pm-11:12 pm

1 stop7h 57m

San Antonio

sáb. 2/28

7:05 am-2:23 pm

1 stop6h 18m

$356

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

mar. 3/10

5:40 pm-11:56 pm

1 stop7h 16m

San Antonio

mar. 3/17

2:35 pm-10:30 pm

1 stop6h 55m

$367

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

mar. 3/10

6:03 am-3:22 pm

2 stops10h 19m

San Antonio

mar. 3/17

12:24 pm-11:12 pm

2 stops9h 48m

$378

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

lun. 4/6

5:30 pm-11:00 pm

1 stop6h 30m

San Antonio

jue. 4/9

4:30 pm-11:25 pm

1 stop5h 55m

$380

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

mar. 3/10

4:30 pm-12:10 am

2 stops8h 40m

San Antonio

mar. 3/31

7:05 am-3:55 pm

2 stops7h 50m

$387

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

lun. 3/23

5:30 am-11:15 am

1 stop6h 45m

San Antonio

lun. 3/30

5:15 pm-12:05 am

1 stop5h 50m

$393

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

mar. 3/3

12:45 pm-11:05 pm

2 stops11h 20m

San Antonio

vie. 3/6

5:35 am-4:45 pm

2 stops10h 10m

$393

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

mar. 3/10

4:30 pm-10:30 pm

1 stop7h 00m

$184

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

Showing 1-10 of 19 results
1
2

Compare providers for flights from Portland to San Antonio

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Portland to San Antonio in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Portland, Maine-San Antonio flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland, Maine-San Antonio flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Portland, Maine-San Antonio flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Portland, Maine-San Antonio flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Portland, Maine-San Antonio flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Portland to San Antonio

Have a flexible travel schedule? Discover the best time to fly to San Antonio from Portland with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Portland to San Antonio

What is the cheapest month to book a flight from Portland, Maine to San Antonio?

Currently, August is the cheapest month in which you can book a flight from Portland, Maine to San Antonio (average of $129). Flying from Portland, Maine to San Antonio in May is currently the most expensive (average of $200). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from Portland, Maine to San Antonio?

Reviews of airlines servicing San Antonio

Get insights into the airlines that provide service to San Antonio. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Antonio. Reviews last updated enero 27, 2026.
See what other customers who have flown with Southwest, Delta, and United Airlines from Portland to San Antonio have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,268 reviews

Crew

8.6

Comfort

8.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
8.0
Very good
4,268 reviews
Southwest
8.0
Very good
4,268 reviews

Crew

8.6

Comfort

8.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Delta
7.9
Good
8,118 reviews
Southwest
8.0
Very good
4,268 reviews

Crew

8.6

Comfort

8.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
United Airlines
7.4
Good
9,205 reviews
Southwest
8.0
Very good
4,268 reviews

Crew

8.6

Comfort

8.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
American Airlines
7.2
Good
11,197 reviews
Southwest
8.0
Very good
4,268 reviews

Crew

8.6

Comfort

8.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Related info for your journey

Find useful and relevant information for your journey from Portland to San Antonio. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Portland, Maine to San Antonio?

    There are many flights that can get you from Portland, Maine to San Antonio in 7h 16m. Fly via Southwest, United Airlines, or American Airlines to get the fastest option. Airlines will cover a distance of 1827 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Portland, Maine to San Antonio round-trip?

    Our cheapest airline available from Portland, Maine to San Antonio is Delta. Our recent data shows that you can find tickets from as low as $175 on this airline. Additional options worth looking into are American Airlines and United Airlines, starting at $234 and $296 round-trip. Delta is priced at 64% lower than the current average price of a flight leaving 3 months from now.

  • Can I find deals for flights from Portland to San Antonio that include hotel bookings?

    Yes. In addition to deals on Portland to San Antonio flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Portland to San Antonio?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to San Antonio.

  • Can I find deals for business class flights from Portland to San Antonio?

    Yes. Cheapflights offers flight deals from Portland to San Antonio by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Portland, Maine to San Antonio?

    Currently, August is the cheapest month in which you can book a flight from Portland, Maine to San Antonio (average of $129). Flying from Portland, Maine to San Antonio in May is currently the most expensive (average of $200). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near San Antonio?

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

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Alternative routes for Portland to San Antonio

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Portland to San Antonio

Discover the top 4 airlines that operate flights from Portland to San Antonio. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated enero 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$175Average$426FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$234Average$426FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$296Average$633FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$358Average$506FlexibilityNo cancel feeOn-time63%

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