HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
San Antonio

$175+ 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 10/23. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — SAT
Oct 24 — Oct 311
Fri 10/24
Fri 10/31
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Portland to San Antonio with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Portland to San Antonio are usually found in July or June, booked 40 days in advance, depart on a Wednesday or Saturday and return on a Tuesday

Cheap 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 September 24, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$317
(Delta)

One-way from

$175
(Kiwi.com)

Popular in

April

Cheapest in

July

Average price

$426
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. 12% potential increase in price ($71 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find 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 September 24, 2025.

This Delta deal was found by Cheapflights users on 9/22. 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.
Wed 11/54:48 pmPWM - SAT
1 stop6h 54mDelta
Wed 11/125:15 amSAT - PWM
1 stop5h 53mDelta
Deal found 9/22$317
This Delta deal was found by Cheapflights users on 9/23. 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.
Tue 11/111:25 pmPWM - SAT
1 stop8h 37mDelta
Thu 11/135:15 amSAT - PWM
1 stop6h 15mDelta
Deal found 9/23$340
This United Airlines deal was found by Cheapflights users on 9/23. 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.
Tue 11/114:51 pmPWM - SAT
1 stop7h 25mUnited Airlines
Thu 11/132:14 pmSAT - PWM
2 stops8h 03mUnited Airlines
Deal found 9/23$345
This Delta deal was found by Cheapflights users on 9/23. 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.
Tue 10/285:42 amPWM - SAT
2 stops11h 25mDelta
Fri 10/3112:22 pmSAT - PWM
2 stops10h 43mDelta
Deal found 9/23$378
This American Airlines deal was found by Cheapflights users on 9/22. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/155:21 pmPWM - SAT
1 stop6h 35mAmerican Airlines
Mon 10/207:00 amSAT - PWM
1 stop7h 35mAmerican Airlines
Deal found 9/22$401
This American Airlines deal was found by Cheapflights users on 9/23. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/25:21 pmPWM - SAT
1 stop6h 44mAmerican Airlines
Mon 11/1012:45 pmSAT - PWM
1 stop7h 50mAmerican Airlines
Deal found 9/23$405
This United Airlines deal was found by Cheapflights users on 9/22. 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.
Wed 10/154:57 pmPWM - SAT
1 stop6h 58mUnited Airlines
Mon 10/205:30 amSAT - PWM
2 stops10h 14mUnited Airlines
Deal found 9/22$420
This Southwest deal was found by Cheapflights users on 9/22. 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.
Fri 11/145:30 amPWM - SAT
1 stop8h 00mSouthwest
Sat 11/225:30 pmSAT - PWM
1 stop5h 50mSouthwest
Deal found 9/22$457

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 September 24, 2025.
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

Tue 10/28

2:10 pm-10:56 pm

1 stop9h 46m

San Antonio

Fri 10/31

6:05 am-2:38 pm

1 stop7h 33m

$317

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

Tue 10/28

6:00 am-1:28 pm

1 stop8h 28m

San Antonio

Fri 10/31

5:14 am-12:22 pm

1 stop6h 08m

$317

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

Wed 11/5

5:21 pm-11:05 pm

1 stop6h 44m

San Antonio

Wed 11/12

1:40 pm-9:35 pm

1 stop6h 55m

$317

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

Wed 11/5

4:48 pm-10:42 pm

1 stop6h 54m

San Antonio

Wed 11/12

5:15 am-12:08 pm

1 stop5h 53m

$317

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

Tue 11/11

4:51 pm-11:16 pm

1 stop7h 25m

San Antonio

Thu 11/13

2:14 pm-11:17 pm

2 stops8h 03m

$345

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

Thu 10/23

12:34 pm-7:41 pm

2 stops32h 07m

$175

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

Thu 10/23

2:42 pm-10:57 pm

1 stop9h 15m

$182

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

Mon 12/22

5:19 pm-10:36 pm

1 stop6h 17m

$227

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

Thu 10/9

3:28 pm-9:48 pm

1 stop7h 20m

$288

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

Thu 10/9

6:00 am-11:37 am

1 stop6h 37m

$319

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/23

Showing 1-10 of 12 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 September.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice 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

How far ahead should I book a flight from Portland, Maine to San Antonio?

Use this chart to determine the optimal time to book a round-trip flight from Portland to San Antonio. Price data was last updated on September 19, 2025.

The price you pay for your flight from Portland, Maine to San Antonio may vary depending on when you book. For the best chance of a lower fare, look to book 40 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 $295). Flying from Portland, Maine to San Antonio in March is currently the most expensive (average of $376). 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.

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 September 24, 2025.
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
4,244 reviews

Overall

8.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,244 reviews
Southwest
8.0
Very good
4,244 reviews

Overall

8.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Delta
8.0
Very good
7,973 reviews
Southwest
8.0
Very good
4,244 reviews

Overall

8.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
8,928 reviews
Southwest
8.0
Very good
4,244 reviews

Overall

8.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,244 reviews

Overall

8.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

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 8h 28m. Fly via American Airlines or Delta 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 American Airlines. Our recent data shows that you can find tickets from as low as $234 on this airline. Additional options worth looking into are Delta and United Airlines, starting at $238 and $296 round-trip. American Airlines is priced at 52% 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 $295). Flying from Portland, Maine to San Antonio in March is currently the most expensive (average of $376). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Portland to San Antonio

See prices for flight routes from nearby airports that may be better suited for you.
Boston to Dallas/Fort Worth flights
Boston to Hobby flights
Boston to Austin flights
Boston to George Bush Intcntl flights
Boston to Love Field flights
Boston to San Antonio flights
Portland to Dallas/Fort Worth flights
Portland to Austin flights
Portland to Hobby flights
Portland to George Bush Intcntl flights
Boston to El Paso flights
Portland to Love Field flights
Bangor to Dallas/Fort Worth flights
Boston to McAllen flights
Bangor to Austin flights
Bangor to San Antonio flights
Bangor to Hobby flights
Boston to Brownsville flights
Bangor to George Bush Intcntl flights
Boston to Harlingen flights
Boston to Midland flights
Boston to Corpus Christi flights
Boston to Amarillo flights
Boston to Lubbock flights
Boston to College Station flights
Boston to Waco flights
Boston to Killeen flights
Boston to Abilene flights
Bangor to Love Field flights
Portland to El Paso flights
Boston to Longview flights
Portland to Killeen flights
Boston to Laredo flights
Boston to San Angelo flights
Portland to San Angelo flights
Portland to Harlingen flights
Boston to Tyler flights
Presque Isle to San Antonio flights
Boston to Beaumont flights
Augusta to Dallas/Fort Worth flights
Rockland to Dallas/Fort Worth flights
Presque Isle to Hobby flights
Presque Isle to Dallas/Fort Worth flights
Boston to Carlsbad flights
Bangor to Abilene flights

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 September 24, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$234Average$426FlexibilityNo cancel feeOn-time71%
DeltaCheapest$238Average$485FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$296Average$569FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$377Average$561FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.