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$173+ 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 10/9. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — SAT
oct. 11 — oct. 181
sáb. 10/11
sáb. 10/18
1 adult, Economy
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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”

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Cheapflights Tip: The best prices from Portland to San Antonio are usually found in June or July, 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 septiembre 11, 2025.

Round-trip from

$219
(United Airlines)

One-way from

$173
(American Airlines)

Popular in

April

Cheapest in

June

Average price

$426
From Portland to San Antonio
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One-way flight from Portland to San Antonio
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Highest demand for flights based on searches. 13% potential increase in price ($75 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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 septiembre 11, 2025.

This United Airlines deal was found by Cheapflights users on 9/10. 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.
mié. 11/54:54 pmPWM - SAT
1 stop7h 22mUnited Airlines
mié. 11/127:07 amSAT - PWM
1 stop6h 12mUnited Airlines
Deal found 9/10$219
This United Airlines deal was found by Cheapflights users on 9/10. 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.
mié. 10/86:00 amPWM - SAT
1 stop6h 37mUnited Airlines
sáb. 10/111:05 pmSAT - PWM
2 stops9h 15mUnited Airlines
Deal found 9/10$224
This American Airlines deal was found by Cheapflights users on 9/10. 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.
mié. 11/55:21 pmPWM - SAT
1 stop6h 44mAmerican Airlines
mié. 11/126:04 amSAT - PWM
1 stop10h 01mAmerican Airlines
Deal found 9/10$237
This United Airlines deal was found by Cheapflights users on 9/10. 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.
mié. 10/86:00 amPWM - SAT
1 stop6h 37mUnited Airlines
lun. 10/136:45 amSAT - PWM
1 stop6h 48mUnited Airlines
Deal found 9/10$249
This Delta deal was found by Cheapflights users on 9/10. 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.
mié. 10/84:48 pmPWM - SAT
1 stop6h 54mDelta
sáb. 10/112:55 pmSAT - PWM
1 stop6h 24mDelta
Deal found 9/10$277
This Delta deal was found by Cheapflights users on 9/10. 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.
mié. 12/174:53 pmPWM - SAT
1 stop7h 03mDelta
lun. 1/125:20 amSAT - PWM
1 stop5h 37mDelta
Deal found 9/10$278
This Delta deal was found by Cheapflights users on 9/10. 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.
jue. 12/184:53 pmPWM - SAT
1 stop7h 03mDelta
lun. 1/125:20 amSAT - PWM
1 stop5h 37mDelta
Deal found 9/10$279
This Delta deal was found by Cheapflights users on 9/11. 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.
mié. 11/56:01 amPWM - SAT
2 stops11h 10mDelta
mié. 11/125:15 amSAT - PWM
1 stop5h 53mDelta
Deal found 9/11$282
This Delta deal was found by Cheapflights users on 9/10. 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.
mié. 12/174:53 pmPWM - SAT
1 stop7h 03mDelta
jue. 1/85:30 amSAT - PWM
2 stops9h 26mDelta
Deal found 9/10$283
This Delta deal was found by Cheapflights users on 9/10. 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.
jue. 12/184:53 pmPWM - SAT
1 stop7h 03mDelta
jue. 1/85:30 amSAT - PWM
2 stops9h 26mDelta
Deal found 9/10$284
This Southwest deal was found by Cheapflights users on 9/11. 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.
mié. 11/512:45 pmPWM - SAT
2 stops10h 05mSouthwest
mié. 11/123:05 pmSAT - PWM
1 stop6h 10mSouthwest
Deal found 9/11$286

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 septiembre 11, 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

mié. 11/5

4:54 pm-11:16 pm

1 stop7h 22m

San Antonio

mié. 11/12

7:07 am-2:19 pm

1 stop6h 12m

$219

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

mié. 10/8

6:00 am-11:37 am

1 stop6h 37m

San Antonio

lun. 10/13

6:45 am-2:33 pm

1 stop6h 48m

$249

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

mié. 10/8

6:00 am-3:56 pm

2 stops10h 56m

San Antonio

sáb. 10/11

2:55 pm-10:19 pm

1 stop6h 24m

$282

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

mié. 11/5

6:01 am-4:11 pm

2 stops11h 10m

San Antonio

mié. 11/12

1:05 pm-10:19 pm

1 stop8h 14m

$282

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

mié. 10/29

4:54 pm-11:16 pm

1 stop7h 22m

San Antonio

dom. 11/2

7:07 am-2:19 pm

1 stop6h 12m

$282

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

mié. 11/5

12:45 pm-9:50 pm

2 stops10h 05m

San Antonio

mié. 11/12

3:05 pm-10:15 pm

1 stop6h 10m

$286

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

mié. 11/12

6:00 am-3:46 pm

2 stops10h 46m

San Antonio

mié. 11/19

5:15 am-4:00 pm

2 stops9h 45m

$287

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

jue. 10/9

5:21 pm-10:56 pm

1 stop6h 35m

$173

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

lun. 12/22

5:19 pm-10:34 pm

1 stop6h 15m

$173

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

jue. 12/25

5:35 am-12:30 pm

1 stop7h 55m

$190

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 16 results
1
2

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 August 29, 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 septiembre 11, 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
4,248 reviews

Food

7.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

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
4,248 reviews
Southwest
8.0
Very good
4,248 reviews

Food

7.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

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
7,960 reviews
Southwest
8.0
Very good
4,248 reviews

Food

7.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

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
8,937 reviews
Southwest
8.0
Very good
4,248 reviews

Food

7.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

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
4,248 reviews

Food

7.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

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 7h 22m. Fly via United 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 51% 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

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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 septiembre 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$234Average$431FlexibilityNo cancel feeOn-time71%
DeltaCheapest$238Average$496FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$296Average$622FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$366Average$538FlexibilityNo cancel feeOn-time63%

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