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Cheap flights from Portland to San Antonio from $134

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portland to San Antonio departing on 8/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Portland to San Antonio

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
5:08 pm - 12:26 am
PDX
-
SAT
5h 18m
1 stop
Delta Logo
12:39 pm - 4:03 pm
SAT
-
PDX
5h 24m
1 stop
$267Delta
Wed, Aug 19 - Sat, Aug 22
Delta Logo
5:40 am - 1:40 pm
PDX
-
SAT
6h 00m
1 stop
Delta Logo
2:30 pm - 7:45 pm
SAT
-
PDX
7h 15m
1 stop
$269Delta
Sat, Sep 26 - Sat, Oct 10
Southwest Logo
8:00 am - 5:40 pm
PDX
-
SAT
7h 40m
1 stop
Southwest Logo
7:40 pm - 11:35 pm
SAT
-
PDX
5h 55m
1 stop
$270Southwest
Sat, Oct 10 - Tue, Oct 13
Southwest Logo
6:55 am - 6:00 pm
PDX
-
SAT
9h 05m
2 stops
Southwest Logo
7:05 pm - 11:05 pm
SAT
-
PDX
6h 00m
1 stop
$272Southwest
Wed, Aug 19 - Thu, Sep 10
Southwest Logo
6:55 am - 6:00 pm
PDX
-
SAT
9h 05m
2 stops
Southwest Logo
6:00 am - 1:20 pm
SAT
-
PDX
9h 20m
1 stop
$274Southwest
Wed, Aug 12 - Tue, Aug 25
Southwest Logo
6:20 am - 3:25 pm
PDX
-
SAT
7h 05m
1 stop
Southwest Logo
4:20 pm - 10:15 pm
SAT
-
PDX
7h 55m
2 stops
$276Southwest
Sat, Sep 26 - Wed, Sep 30
Southwest Logo
6:55 am - 6:00 pm
PDX
-
SAT
9h 05m
2 stops
Southwest Logo
3:30 pm - 11:05 pm
SAT
-
PDX
9h 35m
2 stops
$277Southwest
Wed, Sep 9 - Thu, Sep 10
Frontier Logo
9:34 pm - 11:48 am
PDX
-
SAT
12h 14m
1 stop
Frontier Logo
10:41 pm - 8:39 pm
SAT
-
PDX
23h 58m
1 stop
$278Frontier
Thu, Oct 8 - Sun, Oct 11
Southwest Logo
6:55 am - 6:00 pm
PDX
-
SAT
9h 05m
2 stops
Southwest Logo
12:10 pm - 7:50 pm
SAT
-
PDX
9h 40m
2 stops
$279Southwest
Wed, Aug 12 - Tue, Aug 25
Southwest Logo
12:40 pm - 10:15 pm
PDX
-
SAT
7h 35m
2 stops
Southwest Logo
5:35 am - 3:00 pm
SAT
-
PDX
11h 25m
2 stops
$281Southwest
Mon, Aug 24 - Mon, Aug 31

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Southwest flights from Portland to San Antonio

Our best Southwest deals on Portland to San Antonio flight tickets
Southwest
Oct 10
PDX8:00 amPortland
7h 40m
1 stop
SAT5:40 pmSan Antonio
Oct 13
SAT7:40 pmSan Antonio
5h 55m
1 stop
PDX11:35 pmPortland
$270
Southwest
Aug 19
PDX6:55 amPortland
9h 05m
2 stops
SAT6:00 pmSan Antonio
Sep 10
SAT7:05 pmSan Antonio
6h 00m
1 stop
PDX11:05 pmPortland
$272
Southwest
Aug 12
PDX6:55 amPortland
9h 05m
2 stops
SAT6:00 pmSan Antonio
Aug 25
SAT6:00 amSan Antonio
9h 20m
1 stop
PDX1:20 pmPortland
$274

Frontier flights from Portland to San Antonio

Our best Frontier deals on Portland to San Antonio flight tickets
Frontier
Oct 8
PDX9:34 pmPortland
12h 14m
1 stop
SAT11:48 amSan Antonio
Oct 11
SAT10:41 pmSan Antonio
23h 58m
1 stop
PDX8:39 pmPortland
$278
Frontier
Jul 16
PDX6:49 pmPortland
23h 48m
1 stop
SAT8:37 pmSan Antonio
Jul 22
SAT9:32 pmSan Antonio
22h 32m
1 stop
PDX6:04 pmPortland
$288
Frontier
Oct 21
PDX5:35 pmPortland
18h 40m
1 stop
SAT2:15 pmSan Antonio
Oct 25
SAT10:41 pmSan Antonio
23h 58m
1 stop
PDX8:39 pmPortland
$294

momondo 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, momondo users made 832,500 searches. Data last updated July 11, 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

Price

Cheapest round-trip
Quickest round-trip

PortlandSan Antonio

PDX - SAT

PDXSAT

Portland

Wed 8/19

5:08 pm-12:26 am

1 stop5h 18m

San Antonio

Sat 8/22

12:39 pm-4:03 pm

1 stop5h 24m

$267

PortlandSan Antonio

PDX - SAT

PDXSAT

Portland

Sat 9/26

5:40 am-1:40 pm

1 stop6h 00m

San Antonio

Sat 10/10

2:30 pm-7:45 pm

1 stop7h 15m

$269

PortlandSan Antonio

PDX - SAT

PDXSAT

Portland

Sat 10/10

8:00 am-5:40 pm

1 stop7h 40m

San Antonio

Tue 10/13

7:40 pm-11:35 pm

1 stop5h 55m

$270

PortlandSan Antonio

PDX - SAT

PDXSAT

Portland

Wed 8/19

6:55 am-6:00 pm

2 stops9h 05m

San Antonio

Thu 9/10

7:05 pm-11:05 pm

1 stop6h 00m

$272

PortlandSan Antonio

PDX - SAT

PDXSAT

Portland

Wed 8/12

6:55 am-6:00 pm

2 stops9h 05m

San Antonio

Tue 8/25

6:00 am-1:20 pm

1 stop9h 20m

$274

PortlandSan Antonio

PDX - SAT

PDXSAT

Portland

Sat 9/26

6:20 am-3:25 pm

1 stop7h 05m

San Antonio

Wed 9/30

4:20 pm-10:15 pm

2 stops7h 55m

$276

PortlandSan Antonio

PDX - SAT

PDXSAT

Portland

Wed 9/9

6:55 am-6:00 pm

2 stops9h 05m

San Antonio

Thu 9/10

3:30 pm-11:05 pm

2 stops9h 35m

$277

PortlandSan Antonio

PDX - SAT

PDXSAT

Portland

Thu 10/8

9:34 pm-11:48 am

1 stop12h 14m

San Antonio

Sun 10/11

10:41 pm-8:39 pm

1 stop23h 58m

$278

PortlandSan Antonio

PDX - SAT

PDXSAT

Portland

Wed 8/12

6:55 am-6:00 pm

2 stops9h 05m

San Antonio

Tue 8/25

12:10 pm-7:50 pm

2 stops9h 40m

$279

PortlandSan Antonio

PDX - SAT

PDXSAT

Portland

Mon 8/24

12:40 pm-10:15 pm

2 stops7h 35m

San Antonio

Mon 8/31

5:35 am-3:00 pm

2 stops11h 25m

$281

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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2

See travel insights to San Antonio from

How to get the cheapest flight ticket from Portland to San Antonio

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Portland and San Antonio?

What is the cheapest month to fly to San Antonio?

If you aren’t able to travel during the month of September, then book flights to San Antonio from Portland during August instead. Flights to San Antonio in August, while not as cheap as those in September, still average around $357.

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

You are more likely to see cheaper flights to San Antonio from Portland when booking weeks ahead of your departure date. In general, you can expect to find flights to San Antonio for around $413 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Antonio from Portland for as low as $283 on momondo.

How have Portland to San Antonio flight prices changed over time?

As of July 2026, prices for Portland to San Antonio flights are approximately 22% more expensive when compared to flights at the same time last year.

When to book flights from Portland to San Antonio

Are you open to changing your travel dates? Check out the ideal times to fly from Portland to San Antonio according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Portland to San Antonio (PDX to SAT) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portland to San Antonio

Fastest flight time

5h 18m

Direct flights

None
The fastest flight from Portland to San Antonio takes 5h 18m
There are no direct flights from Portland to San Antonio. There are no popular flight routes from Portland to San Antonio.
Search flight deals

Frequently asked questions about flying from Portland to San Antonio

  • How far is Portland to San Antonio by plane?

    San Antonio is 1717.5 mi away from Portland. By plane, this route typically takes 5h 18m.

  • When did momondo last update prices for flights from Portland Airport to San Antonio Airport?

    Prices for flights from Portland Airport to San Antonio Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Portland Airport to San Antonio Airport?

  • How old do you have to be to fly from Portland Airport to San Antonio Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Portland Airport to San Antonio Airport.

  • What documentation or ID do you need to fly to San Antonio Airport?

    The required travel and health documents for your San Antonio Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at San Antonio Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Portland to San Antonio?

Best airlines flying from Portland to San Antonio

Compare and see reviews for airlines that fly from Portland to San Antonio with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $136Free CancellationRating
5.6
2,832 reviews
Search Frontier flights
American AirlinesPriceFrom $168Free CancellationRating
7.1
11,806 reviews
Search American Airlines flights
United AirlinesPriceFrom $237Free CancellationRating
7.4
9,976 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $248Free CancellationRating
7.9
12,657 reviews
Search Alaska Airlines flights
DeltaPriceFrom $270Free CancellationRating
7.8
8,457 reviews
Search Delta flights
SouthwestPriceFrom $300Free CancellationRating
7.9
4,248 reviews
Search Southwest flights

Traveling to a place near San Antonio?

Book flights to San Antonio if you plan to visit one of these locations
New Braunfels
Kerrville
Pleasanton
Boerne
Schertz

Why use momondo?

Why should I use momondo to find a flight deal from Portland to San Antonio?

Finding the right flight to San Antonio from Portland is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to San Antonio quick and easy, saving you time and money.

Can I find flights from Portland to San Antonio with flexible booking policies on momondo?

Flights from Portland to San Antonio with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Portland to San Antonio?

momondo helps you find the best flight between Portland and San Antonio by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Portland to San Antonio right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Portland to San Antonio flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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