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Cheap flights from Portland to San Antonio from $86

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 5/15. 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
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.
Frontier Logo
5:46 pm - 6:59 pm
PDX
-
SAT
23h 13m
1 stop
Frontier Logo
7:54 pm - 4:35 pm
SAT
-
PDX
22h 41m
1 stop
$161Frontier
Tue, Jun 2 - Mon, Jun 8
Frontier Logo
9:46 pm - 8:14 pm
PDX
-
SAT
20h 28m
1 stop
Frontier Logo
8:59 pm - 10:20 am
SAT
-
PDX
15h 21m
1 stop
$172Frontier
Thu, May 14 - Sat, May 23
Frontier Logo
9:46 pm - 8:14 pm
PDX
-
SAT
20h 28m
1 stop
Frontier Logo
8:59 pm - 10:20 am
SAT
-
PDX
15h 21m
1 stop
$185Frontier
Thu, May 14 - Sat, May 23
Frontier Logo
12:38 pm - 2:15 pm
PDX
-
SAT
23h 37m
1 stop
Frontier Logo
8:59 pm - 8:51 pm
SAT
-
PDX
25h 52m
1 stop
$196Frontier
Wed, Apr 29 - Wed, May 6
Frontier Logo
8:46 pm - 8:14 pm
PDX
-
SAT
21h 28m
1 stop
Frontier Logo
7:54 pm - 4:46 pm
SAT
-
PDX
22h 52m
1 stop
$216Frontier
Fri, May 15 - Fri, May 22
Frontier Logo
11:29 am - 8:14 pm
PDX
-
SAT
6h 45m
1 stop
Frontier Logo
7:54 pm - 4:46 pm
SAT
-
PDX
22h 52m
1 stop
$217Frontier
Sat, May 30 - Sun, May 31
Frontier Logo
5:46 pm - 6:59 pm
PDX
-
SAT
23h 13m
1 stop
Frontier Logo
8:59 pm - 4:35 pm
SAT
-
PDX
21h 36m
2 stops
$226Frontier
Tue, Jun 2 - Mon, Jun 8
Frontier Logo
12:35 pm - 6:59 pm
PDX
-
SAT
28h 24m
1 stop
Frontier Logo
7:54 pm - 10:20 am
SAT
-
PDX
16h 26m
2 stops
$228Frontier
Sun, May 17 - Wed, May 20
Frontier Logo
5:46 pm - 6:59 pm
PDX
-
SAT
23h 13m
1 stop
Frontier Logo
7:51 pm - 4:35 pm
SAT
-
PDX
22h 44m
1 stop
$233Frontier
Tue, Jun 2 - Tue, Jun 9
Frontier Logo
5:46 pm - 6:59 pm
PDX
-
SAT
23h 13m
1 stop
Frontier Logo
7:51 pm - 4:35 pm
SAT
-
PDX
22h 44m
1 stop
$234Frontier
Tue, Jun 2 - Tue, Jun 9

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Frontier flights from Portland to San Antonio

Our best Frontier deals on Portland to San Antonio flight tickets
Frontier
Jun 2
PDX5:46 pmPortland
23h 13m
1 stop
SAT6:59 pmSan Antonio
Jun 8
SAT7:54 pmSan Antonio
22h 41m
1 stop
PDX4:35 pmPortland
$161
Frontier
May 14
PDX9:46 pmPortland
20h 28m
1 stop
SAT8:14 pmSan Antonio
May 23
SAT8:59 pmSan Antonio
15h 21m
1 stop
PDX10:20 amPortland
$172
Frontier
May 14
PDX9:46 pmPortland
20h 28m
1 stop
SAT8:14 pmSan Antonio
May 23
SAT8:59 pmSan Antonio
15h 21m
1 stop
PDX10:20 amPortland
$185

Southwest flights from Portland to San Antonio

Our best Southwest deals on Portland to San Antonio flight tickets
Southwest
May 12
PDX6:40 amPortland
6h 30m
1 stop
SAT3:10 pmSan Antonio
May 19
SAT7:15 amSan Antonio
8h 25m
2 stops
PDX1:40 pmPortland
$352
Southwest
May 1
PDX5:20 amPortland
12h 30m
2 stops
SAT7:50 pmSan Antonio
May 9
SAT3:40 pmSan Antonio
8h 05m
2 stops
PDX9:45 pmPortland
$544
Southwest
Apr 30
PDX5:20 amPortland
12h 30m
2 stops
SAT7:50 pmSan Antonio
May 3
SAT6:30 amSan Antonio
8h 50m
2 stops
PDX1:20 pmPortland
$613

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 April 20, 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

PortlandSan Antonio

PDX - SAT

PDXSAT

Portland

Tue 6/2

5:46 pm-6:59 pm

1 stop23h 13m

San Antonio

Mon 6/8

7:54 pm-4:35 pm

1 stop22h 41m

$161

PortlandSan Antonio

PDX - SAT

PDXSAT

Portland

Thu 5/14

9:46 pm-8:14 pm

1 stop20h 28m

San Antonio

Sat 5/23

8:59 pm-10:20 am

1 stop15h 21m

$172

PortlandSan Antonio

PDX - SAT

PDXSAT

Portland

Thu 5/14

9:46 pm-8:14 pm

1 stop20h 28m

San Antonio

Sat 5/23

8:59 pm-10:20 am

1 stop15h 21m

$185

PortlandSan Antonio

PDX - SAT

PDXSAT

Portland

Wed 4/29

12:38 pm-2:15 pm

1 stop23h 37m

San Antonio

Wed 5/6

8:59 pm-8:51 pm

1 stop25h 52m

$196

PortlandSan Antonio

PDX - SAT

PDXSAT

Portland

Fri 5/15

8:46 pm-8:14 pm

1 stop21h 28m

San Antonio

Fri 5/22

7:54 pm-4:46 pm

1 stop22h 52m

$216
Quickest round-trip

PortlandSan Antonio

PDX - SAT

PDXSAT

Portland

Sat 5/30

11:29 am-8:14 pm

1 stop6h 45m

San Antonio

Sun 5/31

7:54 pm-4:46 pm

1 stop22h 52m

$217

PortlandSan Antonio

PDX - SAT

PDXSAT

Portland

Tue 6/2

5:46 pm-6:59 pm

1 stop23h 13m

San Antonio

Mon 6/8

8:59 pm-4:35 pm

2 stops21h 36m

$226

PortlandSan Antonio

PDX - SAT

PDXSAT

Portland

Sun 5/17

12:35 pm-6:59 pm

1 stop28h 24m

San Antonio

Wed 5/20

7:54 pm-10:20 am

2 stops16h 26m

$228

PortlandSan Antonio

PDX - SAT

PDXSAT

Portland

Tue 6/2

5:46 pm-6:59 pm

1 stop23h 13m

San Antonio

Tue 6/9

7:51 pm-4:35 pm

1 stop22h 44m

$233

PortlandSan Antonio

PDX - SAT

PDXSAT

Portland

Tue 6/2

5:46 pm-6:59 pm

1 stop23h 13m

San Antonio

Tue 6/9

7:51 pm-4:35 pm

1 stop22h 44m

$234

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 August, then book flights to San Antonio from Portland during September instead. Flights to San Antonio in September, while not as cheap as those in August, still average around $314.

How far in advance should I book a flight 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 $395 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 $252 on momondo.

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

As of April 2026, prices for Portland to San Antonio flights are approximately 33% 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 08m

Direct flights

None
The fastest flight from Portland to San Antonio takes 5h 08m
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 08m.

  • 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
2,983 reviews
Search Frontier flights
American AirlinesPriceFrom $191Free CancellationRating
7.1
11,629 reviews
Search American Airlines flights
United AirlinesPriceFrom $236Free CancellationRating
7.4
9,608 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $248Free CancellationRating
7.9
12,265 reviews
Search Alaska Airlines flights
DeltaPriceFrom $270Free CancellationRating
7.9
8,424 reviews
Search Delta flights
SouthwestPriceFrom $286Free CancellationRating
8.0
4,330 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
Boerne
Pleasanton
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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