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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 5/23. 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
12:35 pm - 6:59 pm
PDX
-
SAT
28h 24m
1 stop
Frontier Logo
9:09 pm - 10:20 am
SAT
-
PDX
15h 11m
1 stop
$216Frontier
Sat, May 23 - Thu, May 28
Frontier Logo
12:35 pm - 6:59 pm
PDX
-
SAT
28h 24m
1 stop
Frontier Logo
8:59 pm - 10:20 am
SAT
-
PDX
15h 21m
1 stop
$221Frontier
Thu, May 28 - Sun, May 31
Frontier Logo
12:35 pm - 6:59 pm
PDX
-
SAT
28h 24m
1 stop
Frontier Logo
7:54 pm - 4:46 pm
SAT
-
PDX
22h 52m
1 stop
$223Frontier
Thu, Jun 4 - Sun, Jun 7
Frontier Logo
11:15 am - 8:14 pm
PDX
-
SAT
6h 59m
1 stop
Frontier Logo
7:54 pm - 4:35 pm
SAT
-
PDX
22h 41m
1 stop
$230Frontier
Fri, Jun 5 - Mon, Jun 8
Frontier Logo
5:42 pm - 6:56 pm
PDX
-
SAT
23h 14m
1 stop
Frontier Logo
7:51 pm - 4:57 pm
SAT
-
PDX
23h 06m
1 stop
$241Frontier
Wed, Aug 19 - Sat, Aug 22
Frontier Logo
12:26 pm - 6:56 pm
PDX
-
SAT
28h 30m
1 stop
Frontier Logo
7:51 pm - 4:35 pm
SAT
-
PDX
22h 44m
1 stop
$243Frontier
Fri, Jun 26 - Tue, Jun 30
Frontier Logo
8:42 pm - 8:11 pm
PDX
-
SAT
21h 29m
1 stop
Frontier Logo
8:56 pm - 7:47 pm
SAT
-
PDX
24h 51m
1 stop
$261Frontier
Fri, Jun 12 - Sun, Jun 14
Frontier Logo
12:35 pm - 6:59 pm
PDX
-
SAT
28h 24m
1 stop
Frontier Logo
7:51 pm - 4:57 pm
SAT
-
PDX
23h 06m
1 stop
$281Frontier
Sun, Jun 7 - Thu, Jun 11
Frontier Logo
12:26 pm - 6:56 pm
PDX
-
SAT
28h 30m
1 stop
Frontier Logo
8:56 pm - 6:04 pm
SAT
-
PDX
23h 08m
1 stop
$282Frontier
Fri, Jun 26 - Sat, Jul 4
Frontier Logo
5:20 pm - 6:56 pm
PDX
-
SAT
23h 36m
1 stop
Frontier Logo
8:56 pm - 7:47 pm
SAT
-
PDX
24h 51m
1 stop
$290Frontier
Wed, Jun 17 - Sun, Jun 21

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Frontier flights from Portland to San Antonio

Our best Frontier deals on Portland to San Antonio flight tickets
Frontier
May 23
PDX12:35 pmPortland
28h 24m
1 stop
SAT6:59 pmSan Antonio
May 28
SAT9:09 pmSan Antonio
15h 11m
1 stop
PDX10:20 amPortland
$216
Frontier
May 28
PDX12:35 pmPortland
28h 24m
1 stop
SAT6:59 pmSan Antonio
May 31
SAT8:59 pmSan Antonio
15h 21m
1 stop
PDX10:20 amPortland
$221
Frontier
Jun 4
PDX12:35 pmPortland
28h 24m
1 stop
SAT6:59 pmSan Antonio
Jun 7
SAT7:54 pmSan Antonio
22h 52m
1 stop
PDX4:46 pmPortland
$223

United Airlines flights from Portland to San Antonio

Our best United Airlines deals on Portland to San Antonio flight tickets
United Airlines
May 27
PDX5:00 amPortland
5h 43m
1 stop
SAT12:43 pmSan Antonio
May 27
SAT5:57 pmSan Antonio
6h 51m
1 stop
PDX10:48 pmPortland
$386
United Airlines
May 27
PDX12:50 pmPortland
8h 04m
2 stops
SAT10:54 pmSan Antonio
Jun 3
SAT4:35 pmSan Antonio
6h 40m
1 stop
PDX9:15 pmPortland
$407
United Airlines
May 16
PDX3:59 pmPortland
14h 43m
3 stops
SAT8:42 amSan Antonio
May 20
SAT2:25 pmSan Antonio
12h 08m
2 stops
PDX12:33 amPortland
$713

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 May 4, 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

Sat 5/23

12:35 pm-6:59 pm

1 stop28h 24m

San Antonio

Thu 5/28

9:09 pm-10:20 am

1 stop15h 11m

$216

PortlandSan Antonio

PDX - SAT

PDXSAT

Portland

Thu 5/28

12:35 pm-6:59 pm

1 stop28h 24m

San Antonio

Sun 5/31

8:59 pm-10:20 am

1 stop15h 21m

$221

PortlandSan Antonio

PDX - SAT

PDXSAT

Portland

Thu 6/4

12:35 pm-6:59 pm

1 stop28h 24m

San Antonio

Sun 6/7

7:54 pm-4:46 pm

1 stop22h 52m

$223
Quickest round-trip

PortlandSan Antonio

PDX - SAT

PDXSAT

Portland

Fri 6/5

11:15 am-8:14 pm

1 stop6h 59m

San Antonio

Mon 6/8

7:54 pm-4:35 pm

1 stop22h 41m

$230

PortlandSan Antonio

PDX - SAT

PDXSAT

Portland

Wed 8/19

5:42 pm-6:56 pm

1 stop23h 14m

San Antonio

Sat 8/22

7:51 pm-4:57 pm

1 stop23h 06m

$241

PortlandSan Antonio

PDX - SAT

PDXSAT

Portland

Fri 6/26

12:26 pm-6:56 pm

1 stop28h 30m

San Antonio

Tue 6/30

7:51 pm-4:35 pm

1 stop22h 44m

$243

PortlandSan Antonio

PDX - SAT

PDXSAT

Portland

Fri 6/12

8:42 pm-8:11 pm

1 stop21h 29m

San Antonio

Sun 6/14

8:56 pm-7:47 pm

1 stop24h 51m

$261

PortlandSan Antonio

PDX - SAT

PDXSAT

Portland

Sun 6/7

12:35 pm-6:59 pm

1 stop28h 24m

San Antonio

Thu 6/11

7:51 pm-4:57 pm

1 stop23h 06m

$281

PortlandSan Antonio

PDX - SAT

PDXSAT

Portland

Fri 6/26

12:26 pm-6:56 pm

1 stop28h 30m

San Antonio

Sat 7/4

8:56 pm-6:04 pm

1 stop23h 08m

$282

PortlandSan Antonio

PDX - SAT

PDXSAT

Portland

Wed 6/17

5:20 pm-6:56 pm

1 stop23h 36m

San Antonio

Sun 6/21

8:56 pm-7:47 pm

1 stop24h 51m

$290

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 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 $398 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 May 2026, prices for Portland to San Antonio flights are approximately 64% 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 40m

Direct flights

None
The fastest flight from Portland to San Antonio takes 5h 40m
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 40m.

  • 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
2,965 reviews
Search Frontier flights
American AirlinesPriceFrom $191Free CancellationRating
7.1
11,671 reviews
Search American Airlines flights
United AirlinesPriceFrom $236Free CancellationRating
7.4
9,682 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $248Free CancellationRating
7.9
12,325 reviews
Search Alaska Airlines flights
DeltaPriceFrom $270Free CancellationRating
7.9
8,459 reviews
Search Delta flights
SouthwestPriceFrom $286Free CancellationRating
7.9
4,306 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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