$182+ 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 9/28. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — SAT
Aug 25 — Sep 11
Round-trip
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”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.Cheap flight deals from Portland to San Antonio
Cheapest
Best
Last-minute
One-way
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 July 26, 2026.
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 July 26, 2026.
This American Airlines deal was found by Cheapflights users on 7/21. 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 8/196:09 pm
PWM
- SAT
1 stop7h 39m
American Airlines
Sat 8/2212:29 pm
SAT
- PWM
1 stop8h 31m
American Airlines
Deal found 7/21![American Airlines logo]()
$363
This Southwest deal was found by Cheapflights users on 7/23. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/305:45 am
PWM
- SAT
2 stops9h 50m
Southwest
Mon 10/51:55 pm
SAT
- PWM
2 stops9h 00m
Southwest
Deal found 7/23![Southwest logo]()
$373
This Southwest deal was found by Cheapflights users on 7/21. 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.
Thu 10/85:20 am
PWM
- SAT
1 stop6h 40m
Southwest
Wed 10/143:40 pm
SAT
- PWM
1 stop5h 55m
Southwest
Deal found 7/21![Southwest logo]()
$377
This Southwest deal was found by Cheapflights users on 7/25. 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.
Wed 9/305:45 am
PWM
- SAT
2 stops9h 50m
Southwest
Tue 10/612:55 pm
SAT
- PWM
2 stops8h 40m
Southwest
Deal found 7/25![Southwest logo]()
$379
This Delta deal was found by Cheapflights users on 7/24. 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 12/13:00 pm
PWM
- SAT
2 stops10h 28m
Delta
Mon 12/71:41 pm
SAT
- PWM
1 stop7h 42m
Delta
Deal found 7/24![Delta logo]()
$384
This Southwest deal was found by Cheapflights users on 7/22. 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.
Tue 12/155:10 am
PWM
- SAT
2 stops8h 45m
Southwest
Mon 12/215:05 am
SAT
- PWM
1 stop6h 35m
Southwest
Deal found 7/22![Southwest logo]()
$387
Best flights from Portland to San AntonioDiscover 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 July 26, 2026.
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 July 26, 2026.
This United Airlines deal was found by Cheapflights users on 7/23. 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.
Wed 10/216:00 am
PWM
- SAT
1 stop7h 11m
United Airlines
Sat 10/242:00 pm
SAT
- PWM
1 stop6h 46m
United Airlines
Deal found 7/23![United Airlines logo]()
$363
This Delta deal was found by Cheapflights users on 7/23. 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.
Wed 10/211:52 pm
PWM
- SAT
2 stops11h 35m
Delta
Sat 10/246:45 am
SAT
- PWM
2 stops8h 10m
Delta
Deal found 7/23![Delta logo]()
$374
This Southwest deal was found by Cheapflights users on 7/21. 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.
Thu 10/85:20 am
PWM
- SAT
1 stop6h 40m
Southwest
Wed 10/143:40 pm
SAT
- PWM
1 stop5h 55m
Southwest
Deal found 7/21![Southwest logo]()
$377
This United Airlines deal was found by Cheapflights users on 7/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/307:58 am
PWM
- SAT
1 stop9h 33m
United Airlines
Tue 10/612:50 pm
SAT
- PWM
1 stop6h 32m
United Airlines
Deal found 7/25![United Airlines logo]()
$369
This Delta deal was found by Cheapflights users on 7/24. 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 12/14:50 pm
PWM
- SAT
1 stop7h 30m
Delta
Mon 12/71:41 pm
SAT
- PWM
1 stop7h 42m
Delta
Deal found 7/24![Delta logo]()
$379
This Southwest deal was found by Cheapflights users on 7/21. 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.
Thu 11/55:10 pm
PWM
- SAT
1 stop6h 40m
Southwest
Sun 11/85:15 am
SAT
- PWM
1 stop6h 50m
Southwest
Deal found 7/21![Southwest logo]()
$420
This Delta deal was found by Cheapflights users on 7/21. 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.
Thu 10/86:04 am
PWM
- SAT
1 stop7h 14m
Delta
Wed 10/141:41 pm
SAT
- PWM
2 stops8h 38m
Delta
Deal found 7/21![Delta logo]()
$396
This Southwest deal was found by Cheapflights users on 7/22. 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.
Thu 12/1711:10 am
PWM
- SAT
2 stops9h 55m
Southwest
Wed 12/235:05 am
SAT
- PWM
1 stop6h 35m
Southwest
Deal found 7/22![Southwest logo]()
$425
Last-minute flights from Portland to San AntonioDiscover last-minute flight deals from Portland to San Antonio. Data last updated July 26, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to San Antonio. Data last updated July 26, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 7/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/137:28 am
PWM
- SAT
1 stop6h 37m
American Airlines
Sun 8/167:05 am
SAT
- PWM
1 stop6h 16m
American Airlines
Deal found 7/25![American Airlines logo]()
$573
This American Airlines deal was found by Cheapflights users on 7/21. 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 8/196:09 pm
PWM
- SAT
1 stop7h 39m
American Airlines
Sat 8/2212:29 pm
SAT
- PWM
1 stop8h 31m
American Airlines
Deal found 7/21![American Airlines logo]()
$363
This United Airlines deal was found by Cheapflights users on 7/22. 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.
Mon 8/316:03 am
PWM
- SAT
1 stop6h 49m
United Airlines
Thu 9/312:55 pm
SAT
- PWM
1 stop7h 28m
United Airlines
Deal found 7/22![United Airlines logo]()
$401
This Delta deal was found by Cheapflights users on 7/23. 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.
Mon 8/3111:01 am
PWM
- SAT
2 stops11h 03m
Delta
Thu 9/311:29 am
SAT
- PWM
2 stops12h 30m
Delta
Deal found 7/23![Delta logo]()
$552
One-way flights from Portland to San AntonioSearch for one-way flight options from Portland to San Antonio. Find affordable one-way fares based on user searches. Data last updated July 26, 2026.
Search for one-way flight options from Portland to San Antonio. Find affordable one-way fares based on user searches. Data last updated July 26, 2026.
This United Airlines deal was found by Cheapflights users on 7/22. 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.
Mon 9/286:00 am
PWM
- SAT
1 stop6h 41m
United Airlines
Deal found 7/22![United Airlines logo]()
$182
This American Airlines deal was found by Cheapflights users on 7/24. 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.
Mon 8/316:09 pm
PWM
- SAT
1 stop7h 39m
American Airlines
Deal found 7/24![American Airlines logo]()
$185
This Southwest deal was found by Cheapflights users on 7/22. 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.
Tue 9/292:50 pm
PWM
- SAT
2 stops9h 15m
Southwest
Deal found 7/22![Southwest logo]()
$187
This Delta deal was found by Cheapflights users on 7/24. 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.
Mon 8/3112:47 pm
PWM
- SAT
2 stops9h 17m
Delta
Deal found 7/24![Delta logo]()
$195
This Southwest deal was found by Cheapflights users on 7/22. 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.
Mon 9/285:55 am
PWM
- SAT
1 stop7h 30m
Southwest
Deal found 7/22![Southwest logo]()
$225
This Kiwi.com deal was found by Cheapflights users on 7/24. 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.
Mon 8/317:00 am
PWM
- SAT
3 stops37h 31m
Multiple Airlines
Deal found 7/24![Multiple Airlines logo]()
$252
This Kiwi.com deal was found by Cheapflights users on 7/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/295:09 pm
PWM
- SAT
3 stops42h 03m
Multiple Airlines
Deal found 7/22![Multiple Airlines logo]()
$270
This Kiwi.com deal was found by Cheapflights users on 7/24. 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.
Mon 9/283:53 pm
PWM
- SAT
3 stops42h 14m
Multiple Airlines
Deal found 7/24![Multiple Airlines logo]()
$336
This United Airlines deal was found by Cheapflights users on 7/22. 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 9/25:03 pm
PWM
- SAT
1 stop6h 47m
United Airlines
Deal found 7/22![United Airlines logo]()
$512
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 July 26, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $363 (American Airlines) |
One-way from | $182 (United Airlines) |
Popular in | August |
Cheapest in | October |
Average price | $647 |
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 July 26, 2026.
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
Cheapest round-trip
PortlandSan Antonio
PWM - SAT
PWMSAT
Portland
Wed 10/21
6:00 am-12:11 pm
1 stop7h 11m
San Antonio
Sat 10/24
2:00 pm-9:46 pm
1 stop6h 46m
$363
PortlandSan Antonio
PWM - SAT
PWMSAT
Portland
Wed 9/30
7:58 am-4:31 pm
1 stop9h 33m
San Antonio
Tue 10/6
12:50 pm-8:22 pm
1 stop6h 32m
$369
PortlandSan Antonio
PWM - SAT
PWMSAT
Portland
Wed 10/21
1:52 pm-12:27 am
2 stops11h 35m
San Antonio
Sat 10/24
6:45 am-3:55 pm
2 stops8h 10m
$374
Quickest round-trip
PortlandSan Antonio
PWM - SAT
PWMSAT
Portland
Thu 10/8
5:20 am-11:00 am
1 stop6h 40m
San Antonio
Wed 10/14
3:40 pm-10:35 pm
1 stop5h 55m
$377
PortlandSan Antonio
PWM - SAT
PWMSAT
Portland
Tue 12/1
4:50 pm-11:20 pm
1 stop7h 30m
San Antonio
Mon 12/7
1:41 pm-10:23 pm
1 stop7h 42m
$379
PortlandSan Antonio
PWM - SAT
PWMSAT
Portland
Thu 10/8
6:04 am-12:18 pm
1 stop7h 14m
San Antonio
Wed 10/14
1:41 pm-11:19 pm
2 stops8h 38m
$396
PortlandSan Antonio
PWM - SAT
PWMSAT
Portland
Thu 11/5
5:10 pm-10:50 pm
1 stop6h 40m
San Antonio
Sun 11/8
5:15 am-1:05 pm
1 stop6h 50m
$420
PortlandSan Antonio
PWM - SAT
PWMSAT
Portland
Thu 12/17
11:10 am-8:05 pm
2 stops9h 55m
San Antonio
Wed 12/23
5:05 am-12:40 pm
1 stop6h 35m
$425
Cheapest one-way
Quickest one-way
PortlandSan Antonio
PWM - SAT
PWMSAT
Portland
Mon 9/28
6:00 am-11:41 am
1 stop6h 41m
$185
PortlandSan Antonio
PWM - SAT
PWMSAT
Portland
Tue 9/29
2:50 pm-11:05 pm
2 stops9h 15m
$187
Showing 1-10 of 14 resultsSorted by cheapest first
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 July.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- 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.
PWM-SAT
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
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 July 26, 2026.
See what other customers who have flown with Southwest,Delta, andUnited 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.
Food
7.0
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Food
7.0
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Food
7.0
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Food
7.0
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Food
7.0
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
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.
Traveling to a place near San Antonio?
Book flights to San Antonio if you plan to visit one of these locationsNew Braunfels
Kerrville
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Portland and San Antonio flights
Browse other Portland and San Antonio flight options. Last updated on July 26, 2026.
Other flights from Portland
Browse through other flights departing from Portland. Flights are based on user searches made on Cheapflights and were last updated on July 26, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to San Antonio
Explore flights to San Antonio departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on July 26, 2026.
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 July 26, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$263 | Average$496 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$279 | Average$446 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$281 | Average$432 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$324 | Average$581 | FlexibilityNo cancel fee | On-time63% |