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Cheap flights from Portland to San Antonio from $78

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 1/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Portland to San Antonio

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
12:05 pm - 9:18 am
PDX
-
SAT
19h 13m1 stop
Frontier Logo
4:06 pm - 11:04 am
SAT
-
PDX
20h 58m1 stop
$178Frontier
Thu, Jan 8 - Thu, Jan 15
Frontier Logo
12:05 pm - 9:18 am
PDX
-
SAT
19h 13m1 stop
Frontier Logo
4:06 pm - 11:04 am
SAT
-
PDX
20h 58m1 stop
$179Frontier
Thu, Jan 8 - Thu, Jan 15
Frontier Logo
12:05 pm - 11:49 am
PDX
-
SAT
21h 44m2 stops
Frontier Logo
4:06 pm - 11:04 am
SAT
-
PDX
20h 58m1 stop
$198Frontier
Thu, Jan 8 - Thu, Jan 15
Frontier Logo
12:05 pm - 11:49 am
PDX
-
SAT
21h 44m2 stops
Frontier Logo
4:06 pm - 11:04 am
SAT
-
PDX
20h 58m1 stop
$200Frontier
Thu, Jan 8 - Thu, Jan 15
Frontier Logo
12:47 pm - 11:21 am
PDX
-
SAT
20h 34m1 stop
Frontier Logo
1:05 pm - 9:34 am
SAT
-
PDX
22h 29m1 stop
$278Frontier
Sun, Jan 4 - Sun, Jan 11
Delta Logo
9:20 am - 11:43 pm
PDX
-
SAT
12h 23m2 stops
Delta Logo
2:42 pm - 12:17 am
SAT
-
PDX
11h 35m2 stops
$294Delta
Thu, Jan 22 - Tue, Jan 27
Delta Logo
7:37 pm - 1:48 pm
PDX
-
SAT
16h 11m2 stops
Delta Logo
6:20 pm - 11:55 pm
SAT
-
PDX
7h 35m1 stop
$300Delta
Thu, Jan 22 - Tue, Jan 27
Delta Logo
1:39 pm - 9:28 pm
PDX
-
SAT
5h 49m1 stop
Delta Logo
6:20 pm - 11:55 pm
SAT
-
PDX
7h 35m1 stop
$303Delta
Sat, Jan 24 - Tue, Feb 3
Alaska Airlines Logo
5:35 pm - 5:45 pm
PDX
-
SAT
22h 10m1 stop
Alaska Airlines Logo
6:46 pm - 12:38 pm
SAT
-
PDX
19h 52m1 stop
$304Alaska Airlines
Thu, Jan 22 - Mon, Jan 26
Alaska Airlines Logo
9:10 am - 5:45 pm
PDX
-
SAT
6h 35m1 stop
Alaska Airlines Logo
6:46 pm - 12:09 am
SAT
-
PDX
7h 23m1 stop
$306Alaska Airlines
Sat, Jan 24 - Tue, Feb 3

Frontier flights from Portland to San Antonio

Our best Frontier deals on Portland to San Antonio flight tickets
Frontier
Jan 8
PDX12:05 pmPortland
19h 13m
1 stop
SAT9:18 amSan Antonio
Jan 15
SAT4:06 pmSan Antonio
20h 58m
1 stop
PDX11:04 amPortland
$178
Find similar
Frontier
Jan 8
PDX12:05 pmPortland
19h 13m
1 stop
SAT9:18 amSan Antonio
Jan 15
SAT4:06 pmSan Antonio
20h 58m
1 stop
PDX11:04 amPortland
$179
Find similar
Frontier
Jan 8
PDX12:05 pmPortland
21h 44m
2 stops
SAT11:49 amSan Antonio
Jan 15
SAT4:06 pmSan Antonio
20h 58m
1 stop
PDX11:04 amPortland
$198
Find similar

Delta flights from Portland to San Antonio

Our best Delta deals on Portland to San Antonio flight tickets
Delta
Jan 22
PDX9:20 amPortland
12h 23m
2 stops
SAT11:43 pmSan Antonio
Jan 27
SAT2:42 pmSan Antonio
11h 35m
2 stops
PDX12:17 amPortland
$294
Find similar
Delta
Jan 22
PDX7:37 pmPortland
16h 11m
2 stops
SAT1:48 pmSan Antonio
Jan 27
SAT6:20 pmSan Antonio
7h 35m
1 stop
PDX11:55 pmPortland
$300
Find similar
Delta
Jan 24
PDX1:39 pmPortland
5h 49m
1 stop
SAT9:28 pmSan Antonio
Feb 3
SAT6:20 pmSan Antonio
7h 35m
1 stop
PDX11:55 pmPortland
$303
Find similar

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 December 18, 2025.
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

PDX - SAT

PDXSAT

Portland

Thu 1/8

12:05 pm-9:18 am

1 stop19h 13m

San Antonio

Thu 1/15

4:06 pm-11:04 am

1 stop20h 58m

$178

PortlandSan Antonio

PDX - SAT

PDXSAT

Portland

Thu 1/8

12:05 pm-9:18 am

1 stop19h 13m

San Antonio

Thu 1/15

4:06 pm-11:04 am

1 stop20h 58m

$179

PortlandSan Antonio

PDX - SAT

PDXSAT

Portland

Thu 1/8

12:05 pm-11:49 am

2 stops21h 44m

San Antonio

Thu 1/15

4:06 pm-11:04 am

1 stop20h 58m

$198

PortlandSan Antonio

PDX - SAT

PDXSAT

Portland

Thu 1/8

12:05 pm-11:49 am

2 stops21h 44m

San Antonio

Thu 1/15

4:06 pm-11:04 am

1 stop20h 58m

$200

PortlandSan Antonio

PDX - SAT

PDXSAT

Portland

Sun 1/4

12:47 pm-11:21 am

1 stop20h 34m

San Antonio

Sun 1/11

1:05 pm-9:34 am

1 stop22h 29m

$278

PortlandSan Antonio

PDX - SAT

PDXSAT

Portland

Thu 1/22

9:20 am-11:43 pm

2 stops12h 23m

San Antonio

Tue 1/27

2:42 pm-12:17 am

2 stops11h 35m

$294

PortlandSan Antonio

PDX - SAT

PDXSAT

Portland

Thu 1/22

7:37 pm-1:48 pm

2 stops16h 11m

San Antonio

Tue 1/27

6:20 pm-11:55 pm

1 stop7h 35m

$300

PortlandSan Antonio

PDX - SAT

PDXSAT

Portland

Sat 1/24

1:39 pm-9:28 pm

1 stop5h 49m

San Antonio

Tue 2/3

6:20 pm-11:55 pm

1 stop7h 35m

$303

PortlandSan Antonio

PDX - SAT

PDXSAT

Portland

Thu 1/22

5:35 pm-5:45 pm

1 stop22h 10m

San Antonio

Mon 1/26

6:46 pm-12:38 pm

1 stop19h 52m

$304

PortlandSan Antonio

PDX - SAT

PDXSAT

Portland

Sat 1/24

9:10 am-5:45 pm

1 stop6h 35m

San Antonio

Tue 2/3

6:46 pm-12:09 am

1 stop7h 23m

$306

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 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.

What is the cheapest day to depart on your flight to San Antonio?

The cheapest day to depart on your flight to San Antonio is on a Tuesday when prices can be found for as low as $347. This is often the case because there is less demand to fly during this day of the week. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to San Antonio on Sunday is $459.

What is the cheapest time of day to depart on your flight to San Antonio?

According to our data, the cheapest time of day to fly to San Antonio is in the evening. momondo users have found flights departing from Portland to San Antonio in the evening for as low as $332. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to San Antonio are more costly in the afternoon, with an average ticket price of $394. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

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 $394 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 $320 on momondo.

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

As of December 2025, prices for Portland to San Antonio flights are approximately 17% 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 20m

Direct flights

None
The fastest flight from Portland to San Antonio takes 5h 20m
There are no direct flights from Portland to San Antonio. There are no popular flight routes from Portland to San Antonio.
Search flight deals

  • 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 20m.

  • 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
5.8
3,082 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $144Free CancellationRating
6.3
8,190 reviews
Search Spirit Airlines flights
American AirlinesPriceFrom $224Free CancellationRating
7.2
11,053 reviews
Search American Airlines flights
Alaska AirlinesPriceFrom $247Free CancellationRating
8.0
11,474 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom $269Free CancellationRating
7.4
9,091 reviews
Search United Airlines flights
DeltaPriceFrom $276Free CancellationRating
7.9
8,006 reviews
Search Delta flights
SouthwestPriceFrom $286Free CancellationRating
7.9
4,249 reviews
Search Southwest flights

  • United Airlines Flights From Portland to San Antonio

    United Airlines flight deals from Portland to San Antonio start from $269 round-trip. Over the 3 United Airlines flights for this route in a normal week, average airfare is usually $419 round-trip - but some users have found much cheaper deals with momondo.

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
Schertz
Pleasanton

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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