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 04m. Fly via Delta or United 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 United Airlines. Our recent data shows that you can find tickets from as low as $223 on this airline. Additional options worth looking into are American Airlines and Delta, starting at $234 and $238 round-trip. United Airlines is priced at 56% lower than the current average price of a flight leaving 3 months from now.

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.

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).

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

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

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

When flying from Portland, Maine to San Antonio, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Most accurate provider : When it comes to deals on Portland, Maine-San Antonio flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Portland, Maine-San Antonio flight deals on Cheapflights vs. eDreams >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.

$152+ Flights from Portland, ME to San Antonio

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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

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Cheapflights Tip: The best prices from Portland to San Antonio are usually found in July or October, booked 40 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	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$317 (Delta)
One-way from	$152 (Kiwi.com)
Popular in	February
Cheapest in	July
Average price	$411

Provider with most accurate pricing for Portland-San Antonio flight deals.

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Provider most trusted by Cheapflights users for Portland-San Antonio flights.

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From Portland to San Antonio

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One-way flight from Portland to San Antonio

Search Deals

Highest demand for flights based on searches. 7% potential increase in price ($44 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($19 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in October 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 October 29, 2025.

Wed 12/34:53 pmPWM - SAT

1 stop7h 04mDelta

Sat 12/63:30 pmSAT - PWM

1 stop5h 53mDelta

Deal found 10/27

$317

Wed 11/126:18 pmPWM - SAT

2 stops25h 14mMultiple Airlines

Sun 11/164:54 pmSAT - PWM

1 stop15h 12mMultiple Airlines

Deal found 10/28

$384

Mon 11/32:36 pmPWM - SAT

2 stops28h 56mMultiple Airlines

Thu 11/134:54 pmSAT - PWM

1 stop15h 12mMultiple Airlines

Deal found 10/27

$458

Tue 11/115:43 amPWM - SAT

1 stop18h 22mAmerican Airlines

Sat 11/156:50 amSAT - PWM

1 stop13h 57mAmerican Airlines

Deal found 10/27

$477

Tue 11/259:45 amPWM - SAT

1 stop7h 35mUnited Airlines

Mon 12/17:00 amSAT - PWM

1 stop6h 12mUnited Airlines

Deal found 10/27

$483

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 October 29, 2025.

Wed 12/34:53 pmPWM - SAT

1 stop7h 04mDelta

Sat 12/63:30 pmSAT - PWM

1 stop5h 53mDelta

Deal found 10/27

$317

Sat 2/76:00 amPWM - SAT

2 stops10h 46mUnited Airlines

Sat 2/142:10 pmSAT - PWM

1 stop6h 04mUnited Airlines

Deal found 10/29

$321

Sat 2/75:10 amPWM - SAT

1 stop13h 40mSouthwest

Sat 2/145:30 amSAT - PWM

1 stop6h 55mSouthwest

Deal found 10/29

$353

Tue 2/36:00 amPWM - SAT

2 stops10h 22mDelta

Fri 2/132:10 pmSAT - PWM

1 stop6h 49mDelta

Deal found 10/28

$387

Tue 2/39:00 amPWM - SAT

2 stops11h 41mUnited Airlines

Fri 2/132:10 pmSAT - PWM

2 stops8h 10mUnited Airlines

Deal found 10/28

$392

Tue 2/33:30 pmPWM - SAT

1 stop6h 40mSouthwest

Fri 2/135:20 amSAT - PWM

1 stop7h 25mSouthwest

Deal found 10/28

$392

Tue 3/104:50 pmPWM - SAT

1 stop6h 29mDelta

Wed 3/115:30 amSAT - PWM

2 stops9h 26mDelta

Deal found 10/26

$392

Last-minute flights from Portland to San Antonio
Discover last-minute flight deals from Portland to San Antonio. Data last updated October 29, 2025 and is based on user searches.

Mon 11/32:36 pmPWM - SAT

2 stops28h 56mMultiple Airlines

Thu 11/134:54 pmSAT - PWM

1 stop15h 12mMultiple Airlines

Deal found 10/27

$458

Tue 11/115:43 amPWM - SAT

1 stop18h 22mAmerican Airlines

Sat 11/156:50 amSAT - PWM

1 stop13h 57mAmerican Airlines

Deal found 10/27

$477

Wed 11/126:18 pmPWM - SAT

2 stops25h 14mMultiple Airlines

Sun 11/164:54 pmSAT - PWM

1 stop15h 12mMultiple Airlines

Deal found 10/28

$384

Wed 11/126:00 amPWM - SAT

2 stops11h 20mUnited Airlines

Sun 11/165:30 amSAT - PWM

2 stops7h 44mUnited Airlines

Deal found 10/28

$557

Tue 11/259:45 amPWM - SAT

1 stop7h 35mUnited Airlines

Mon 12/17:00 amSAT - PWM

1 stop6h 12mUnited Airlines

Deal found 10/27

$483

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 October 29, 2025.

Wed 11/1911:21 amPWM - SAT

2 stops33h 17mMultiple Airlines

Deal found 10/28

$152

Wed 11/195:21 pmPWM - SAT

1 stop6h 44mAmerican Airlines

Deal found 10/28

$159

Mon 11/36:05 pmPWM - SAT

3 stops25h 27mMultiple Airlines

Deal found 10/29

$338

Sat 1/34:10 pmPWM - SAT

1 stop7h 44mUnited Airlines

Deal found 10/28

$414

Tue 11/46:00 amPWM - SAT

1 stop8h 28mDelta

Deal found 10/29

$439

Tue 11/46:29 pmPWM - SAT

3 stops49h 37mMultiple Airlines

Deal found 10/29

$472

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

Wed 12/3

4:53 pm-10:57 pm

1 stop7h 04m

San Antonio

Sat 12/6

3:30 pm-10:23 pm

1 stop5h 53m

$317

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

Sat 2/7

6:00 am-3:46 pm

2 stops10h 46m

San Antonio

Sat 2/14

2:10 pm-9:14 pm

1 stop6h 04m

$321

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

Sat 2/7

5:10 am-5:50 pm

1 stop13h 40m

San Antonio

Sat 2/14

5:30 am-1:25 pm

1 stop6h 55m

$353

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

Tue 2/3

6:00 am-3:22 pm

2 stops10h 22m

San Antonio

Fri 2/13

2:10 pm-9:59 pm

1 stop6h 49m

$387

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

Tue 2/3

9:00 am-7:41 pm

2 stops11h 41m

San Antonio

Fri 2/13

2:10 pm-11:20 pm

2 stops8h 10m

$392

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

Tue 2/3

3:30 pm-9:10 pm

1 stop6h 40m

San Antonio

Fri 2/13

5:20 am-1:45 pm

1 stop7h 25m

$392

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

Tue 3/10

4:50 pm-10:19 pm

1 stop6h 29m

San Antonio

Wed 3/11

5:30 am-3:56 pm

2 stops9h 26m

$392

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

Wed 11/19

11:21 am-7:38 pm

2 stops33h 17m

$152

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

Wed 11/19

5:21 pm-11:05 pm

1 stop6h 44m

$159

PortlandSan Antonio

PWM - SAT

PWMSAT

Portland

Mon 11/3

6:05 pm-6:32 pm

3 stops25h 27m

$338

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 13 results

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 October.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Portland, Maine-San Antonio flight deals on Cheapflights vs. eDreams >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 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 $129). Flying from Portland, Maine to San Antonio in February is currently the most expensive (average of $202). 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

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

4,241 reviews

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

4,241 reviews

Southwest

8.0

Very good

4,241 reviews

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

7.9

Good

7,992 reviews

Southwest

8.0

Very good

4,241 reviews

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

8,999 reviews

Southwest

8.0

Very good

4,241 reviews

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

11,032 reviews

Southwest

8.0

Very good

4,241 reviews

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

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 04m. Fly via Delta or United 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 United Airlines. Our recent data shows that you can find tickets from as low as $223 on this airline. Additional options worth looking into are American Airlines and Delta, starting at $234 and $238 round-trip. United Airlines is priced at 56% 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 February is currently the most expensive (average of $202). 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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Kerrville

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Top 4 airlines flying from Portland to San Antonio

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$223	Average$606	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$234	Average$426	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$238	Average$429	FlexibilityNo cancel fee	On-timeN/A
Southwest	Cheapest$392	Average$630	FlexibilityNo cancel fee	On-time63%

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$152+ 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 11/19. 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 October, booked 40 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 October 29, 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 October 29, 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 October.

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?

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

Reviews of airlines servicing San Antonio

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.

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?

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

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?

Traveling to a place near San Antonio?

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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.

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 October 29, 2025.