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 $324 on this airline. Additional options worth looking into are American Airlines and Southwest, starting at $351 and $429 round-trip. Delta is priced at 34% lower than the current average price of a flight leaving 3 months from now.

What are the cheapest airlines to fly from Portland, Maine to San Antonio one-way?

The cheapest airline one-way is Delta, with whom users have recently found tickets for as low as $219. However, be on the lookout for offers from American Airlines and United Airlines, as they are both options that can get you from Portland, Maine to San Antonio for a low price.

What is the cheapest day to fly from Portland, Maine to San Antonio?

Travelers seeking maximum savings on their Portland, Maine to San Antonio flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

What are the most popular airlines that fly from Portland, Maine to San Antonio?

Consider American Airlines, Delta or United Airlines when booking your flight. These represent the most popular airlines when flying from Portland, Maine to San Antonio.

What is the cheapest day to fly round-trip from Portland, Maine to San Antonio?

Users have found that leaving on a Tuesday can be a cost-effective option. It’s possible to save up to 56% on your flight compared to booking on days when demand is much higher.

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

Find a great deal and save up to 278% by booking at least 30 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Portland, Maine to San Antonio within the next two weeks, with the cheapest ticket starting at $669.

What is the cheapest month to fly from Portland, Maine to San Antonio?

July is one of the best times of the year to fly to San Antonio from Portland, Maine. Prices for July average $494 per person but you can even find prices for as low as $218. The most expensive prices can be found in the month of April. Opting for a July flight can save you 30% on your journey compared to booking in April

What is the cheapest time of day to fly from PWM to SAT?

It’s optimal to fly from Portland, Maine to San Antonio in the afternoon. By choosing this option you can save up to 28% on the cost of your flight, compared to a flight at noon.

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 eDreams the most. eDreams 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.

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.

$219+ Flights from Portland, ME to San Antonio - Compare & Save Big

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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Portland to San Antonio are usually found in July or February, booked 29 days in advance, depart on a Wednesday or Saturday and return on a Tuesday

Cheap flight deals from Portland to San Antonio

Most accurate provider	FlightHub 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$324 (Delta)
One-way from	$219 (Delta)
Popular in	April
Cheapest in	July
Average price	$586

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. 14% potential increase in price ($83 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($14 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in May 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 May 1, 2025.

Tue 8/56:53 pmPWM - SAT

1 stop6h 21mDelta

Sat 8/92:49 pmSAT - PWM

1 stop5h 52mDelta

Deal found 4/30

$297

Mon 6/96:33 pmPWM - SAT

1 stop6h 23mAmerican Airlines

Thu 6/121:24 pmSAT - PWM

1 stop8h 23mAmerican Airlines

Deal found 4/30

$351

Wed 5/212:20 pmPWM - SAT

2 stops9h 55mSouthwest

Sat 5/242:20 pmSAT - PWM

2 stops8h 05mSouthwest

Deal found 4/30

$429

Mon 6/97:18 pmPWM - SAT

2 stops28h 33mMultiple Airlines

Thu 6/1212:59 pmSAT - PWM

3 stops45h 58mMultiple Airlines

Deal found 4/30

$515

Fri 5/166:13 amPWM - SAT

1 stop6h 59mUnited Airlines

Tue 5/207:34 amSAT - PWM

1 stop8h 55mUnited Airlines

Deal found 4/30

$617

Best flights from Portland to San Antonio
Discover carefully curated flight deals from Portland to San Antonio that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 1, 2025.

Wed 5/215:30 amPWM - SAT

1 stop6h 43mDelta

Sat 5/244:42 pmSAT - PWM

1 stop6h 17mDelta

Deal found 4/30

$324

Mon 6/96:33 pmPWM - SAT

1 stop6h 23mAmerican Airlines

Thu 6/121:24 pmSAT - PWM

1 stop8h 23mAmerican Airlines

Deal found 4/30

$351

Wed 5/212:20 pmPWM - SAT

2 stops9h 55mSouthwest

Sat 5/242:20 pmSAT - PWM

2 stops8h 05mSouthwest

Deal found 4/30

$429

Mon 6/97:18 pmPWM - SAT

2 stops28h 33mMultiple Airlines

Thu 6/1212:59 pmSAT - PWM

3 stops45h 58mMultiple Airlines

Deal found 4/30

$515

Fri 5/166:13 amPWM - SAT

1 stop6h 59mUnited Airlines

Tue 5/207:34 amSAT - PWM

1 stop8h 55mUnited Airlines

Deal found 4/30

$617

Last-minute flights from Portland to San Antonio
Discover last-minute flight deals from Portland to San Antonio. Data last updated May 1, 2025 and is based on user searches.

Fri 5/166:13 amPWM - SAT

1 stop6h 59mUnited Airlines

Tue 5/207:34 amSAT - PWM

1 stop8h 55mUnited Airlines

Deal found 4/30

$617

Wed 5/215:30 amPWM - SAT

1 stop6h 43mDelta

Sat 5/244:42 pmSAT - PWM

1 stop6h 17mDelta

Deal found 4/30

$324

Wed 5/212:20 pmPWM - SAT

2 stops9h 55mSouthwest

Sat 5/242:20 pmSAT - PWM

2 stops8h 05mSouthwest

Deal found 4/30

$429

Wed 5/218:20 pmPWM - SAT

2 stops27h 31mMultiple Airlines

Sat 5/242:37 pmSAT - PWM

3 stops27h 50mMultiple Airlines

Deal found 4/30

$543

Fri 5/3012:08 pmPWM - SAT

1 stop6h 35mAmerican Airlines

Sun 6/89:15 amSAT - PWM

1 stop7h 28mAmerican Airlines

Deal found 4/30

$362

One-way flights from Portland to San Antonio
Search for one-way flight options from Portland to San Antonio. Find affordable one-way fares based on user searches. Data last updated May 1, 2025.

Sun 6/86:00 amPWM - SAT

2 stops10h 36mDelta

Deal found 4/30

$219

Sun 6/86:00 amPWM - SAT

1 stop6h 39mAmerican Airlines

Deal found 4/30

$236

Sun 6/87:09 pmPWM - SAT

3 stops28h 50mUnited Airlines

Deal found 4/30

$483

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portland to San Antonio that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

Tue 8/5

6:53 pm-12:14 am

1 stop6h 21m

San Antonio

Sat 8/9

2:49 pm-9:41 pm

1 stop5h 52m

$297

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

Mon 6/9

6:33 pm-11:56 pm

1 stop6h 23m

San Antonio

Thu 6/12

1:24 pm-10:47 pm

1 stop8h 23m

$351

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

Wed 5/21

2:20 pm-11:15 pm

2 stops9h 55m

San Antonio

Sat 5/24

2:20 pm-11:25 pm

2 stops8h 05m

$429

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

Mon 6/9

7:18 pm-10:51 pm

2 stops28h 33m

San Antonio

Thu 6/12

12:59 pm-11:57 am

3 stops45h 58m

$515

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

Fri 5/16

6:13 am-12:12 pm

1 stop6h 59m

San Antonio

Tue 5/20

7:34 am-5:29 pm

1 stop8h 55m

$617

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

Sun 6/8

6:00 am-3:36 pm

2 stops10h 36m

$219

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

Sun 6/8

6:00 am-11:39 am

1 stop6h 39m

$236

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

Sun 6/8

7:09 pm-10:59 pm

3 stops28h 50m

$483

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Compare providers for flights from Portland to San Antonio

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 May.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*2 stars
eDreams	Price Accuracy3 stars	Trust 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 eDreams the most. eDreams 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?

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 29 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.

Rainfall in San Antonio by month

In terms of precipitation, rainfall in San Antonio ranges from 1.6 - 3.7 inches per month. May is typically the wettest month, when rainfall can reach 3.7 in. December is typically the driest time to visit San Antonio when rainfall is around 1.6 in.

Temperature in San Antonio by month

If weather is an important factor for your trip to San Antonio, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

Reviews of airlines servicing San Antonio

Southwest

8.0

Very good

4,294 reviews

Reviews

1 / 20

10.0

Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!

Southwest

8.0

Very good

4,294 reviews

Southwest

8.0

Very good

4,294 reviews

Reviews

1 / 20

10.0

Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!

Delta

8.0

Very good

7,934 reviews

Southwest

8.0

Very good

4,294 reviews

Reviews

1 / 20

10.0

Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!

United Airlines

7.4

Good

8,696 reviews

Southwest

8.0

Very good

4,294 reviews

Reviews

1 / 20

10.0

Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!

American Airlines

7.2

Good

10,000 reviews

Southwest

8.0

Very good

4,294 reviews

Reviews

1 / 20

10.0

Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!

Related info for your journey

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 $324 on this airline. Additional options worth looking into are American Airlines and Southwest, starting at $351 and $429 round-trip. Delta is priced at 34% lower than the current average price of a flight leaving 3 months from now.
What are the cheapest airlines to fly from Portland, Maine to San Antonio one-way?
The cheapest airline one-way is Delta, with whom users have recently found tickets for as low as $219. However, be on the lookout for offers from American Airlines and United Airlines, as they are both options that can get you from Portland, Maine to San Antonio for a low price.
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

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Other flights to San Antonio

Top 4 airlines flying from Portland to San Antonio

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$278	Average$445	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$295	Average$496	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$346	Average$593	FlexibilityNo cancel fee	On-time69%
Southwest	Cheapest$366	Average$532	FlexibilityNo cancel fee	On-time63%

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$219+ 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 6/8. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Portland to San Antonio with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Portland to San Antonio are usually found in July or February, booked 29 days in advance, depart on a Wednesday or Saturday and return on a Tuesday

Cheap flight deals from Portland to San Antonio

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Portland to San Antonio

Cheapest flights from Portland to San AntonioExplore 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 May 1, 2025.

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 May 1, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portland to San Antonio that are best for you.

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 May.

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.

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 April 25, 2025.

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

Rainfall in San Antonio by month

Plan your trip to San Antonio by taking into account the average rainfall totals by month.

Temperature in San Antonio by month

Plan your trip to San Antonio by taking into account the average temperature totals by month.

Reviews of airlines servicing San Antonio

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.

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

What are the cheapest airlines to fly from Portland, Maine to San Antonio one-way?

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

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

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

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

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Top 4 airlines flying from Portland to San Antonio

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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 May 1, 2025.