What is the cheapest airline that flies from San Antonio to Idaho?

Frontier, United Airlines, and Southwest are the most popular carriers operating from San Antonio to Idaho

What airlines fly to Idaho?

Delta, United Airlines and Southwest are the top three most popular airlines that fly to Idaho from San Antonio according to our data. Delta is the first choice among our users, with 33% of people opting to fly with this airline when traveling to Idaho. Keep in mind that there are 6 different airlines that fly to Idaho on a routine basis, so you have a few additional options to choose from.

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

Prices for flights from San Antonio Airport to Idaho are updated daily.

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

The number of operators available for flights from San Antonio Airport to Idaho is 4 as of September 2026.

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

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Antonio Airport to Idaho.

What documentation or ID do you need to fly to Idaho?

The necessary travel and health documents for your Idaho trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$104 Cheap Flights from San Antonio to Idaho in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from San Antonio to Idaho

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:56 am - 4:42 pmSAT San Antonio-BOI Boise Air Term. Gowen Fld

8h 46m2 stops Denver Intl San Francisco

6:30 am - 12:46 pmBOI Boise Air Term. Gowen Fld-SAT San Antonio

5h 16m1 stop Denver Intl

$230United Airlines

Tue, Oct 27 - Sat, Oct 31

10:11 pm - 7:00 pmSAT San Antonio-BOI Boise Air Term. Gowen Fld

21h 49m1 stop Las Vegas Harry Reid Intl

9:51 pm - 9:34 pmBOI Boise Air Term. Gowen Fld-SAT San Antonio

22h 43m1 stop Las Vegas Harry Reid Intl

$230Frontier

Sat, Nov 21 - Mon, Dec 7

6:10 am - 11:45 amSAT San Antonio-BOI Boise Air Term. Gowen Fld

6h 35m1 stop Phoenix Sky Harbor Intl

6:00 am - 3:20 pmBOI Boise Air Term. Gowen Fld-SAT San Antonio

8h 20m1 stop Phoenix Sky Harbor Intl

$231Southwest

Sat, Oct 17 - Tue, Oct 20

6:10 am - 11:45 amSAT San Antonio-BOI Boise Air Term. Gowen Fld

6h 35m1 stop Phoenix Sky Harbor Intl

6:35 am - 3:20 pmBOI Boise Air Term. Gowen Fld-SAT San Antonio

7h 45m2 stops Las Vegas Harry Reid Intl Phoenix Sky Harbor Intl

$237Southwest

Sat, Oct 17 - Tue, Oct 20

2:20 pm - 10:59 pmSAT San Antonio-BOI Boise Air Term. Gowen Fld

9h 39m2 stops Houston George Bush Intcntl Denver Intl

2:51 pm - 10:51 pmBOI Boise Air Term. Gowen Fld-SAT San Antonio

7h 00m2 stops Denver Intl Houston George Bush Intcntl

$284United Airlines

Tue, Oct 27 - Sat, Oct 31

4:34 pm - 10:57 pmSAT San Antonio-BOI Boise Air Term. Gowen Fld

7h 23m1 stop Los Angeles

2:50 pm - 9:49 pmBOI Boise Air Term. Gowen Fld-SAT San Antonio

5h 59m1 stop Las Vegas Harry Reid Intl

$290Multiple Airlines

Mon, Oct 5 - Fri, Oct 9

7:00 pm - 11:59 pmSAT San Antonio-BOI Boise Air Term. Gowen Fld

5h 59m1 stop Phoenix Sky Harbor Intl

2:41 pm - 11:59 pmBOI Boise Air Term. Gowen Fld-SAT San Antonio

8h 18m1 stop Dallas/Fort Worth

$291American Airlines

Wed, Oct 21 - Sat, Oct 24

7:50 am - 3:44 pmSAT San Antonio-GEG Spokane

9h 54m1 stop Los Angeles

5:04 pm - 12:30 amGEG Spokane-SAT San Antonio

5h 26m1 stop Salt Lake City

$294Delta

Wed, Oct 21 - Mon, Oct 26

7:45 am - 12:20 pmSAT San Antonio-BOI Boise Air Term. Gowen Fld

5h 35m1 stop Salt Lake City

7:35 am - 2:56 pmBOI Boise Air Term. Gowen Fld-SAT San Antonio

6h 21m1 stop Los Angeles

$317Delta

Fri, Dec 25 - Wed, Dec 30

6:00 am - 11:59 amSAT San Antonio-GEG Spokane

7h 59m1 stop Dallas/Fort Worth

12:49 pm - 8:35 pmGEG Spokane-SAT San Antonio

5h 46m1 stop Dallas/Fort Worth

$377American Airlines

Tue, Oct 20 - Tue, Oct 27

Cheap last minute flights

Enter your travel dates to find the best prices.

6:40 pm - 11:00 pmSAT San Antonio-GEG Spokane

6h 20m1 stop Phoenix Sky Harbor Intl

6:05 am - 3:20 pmGEG Spokane-SAT San Antonio

7h 15m1 stop Phoenix Sky Harbor Intl

$424Southwest

Tue, Sep 22 - Wed, Oct 28

3:15 pm - 11:00 pmSAT San Antonio-GEG Spokane

9h 45m2 stops Dallas Love Field Phoenix Sky Harbor Intl

6:05 am - 3:20 pmGEG Spokane-SAT San Antonio

7h 15m1 stop Phoenix Sky Harbor Intl

$429Southwest

Tue, Sep 22 - Wed, Oct 28

3:19 pm - 1:55 pmSAT San Antonio-BOI Boise Air Term. Gowen Fld

23h 36m1 stop Las Vegas Harry Reid Intl

2:50 pm - 11:44 amBOI Boise Air Term. Gowen Fld-SAT San Antonio

19h 54m1 stop Las Vegas Harry Reid Intl

$440Frontier

Wed, Sep 23 - Sun, Sep 27

12:39 pm - 1:55 pmSAT San Antonio-BOI Boise Air Term. Gowen Fld

26h 16m1 stop Las Vegas Harry Reid Intl

2:50 pm - 2:20 pmBOI Boise Air Term. Gowen Fld-SAT San Antonio

22h 30m1 stop Las Vegas Harry Reid Intl

$480Frontier

Thu, Sep 24 - Mon, Sep 28

4:50 pm - 11:48 pmSAT San Antonio-GEG Spokane

8h 58m1 stop Los Angeles

5:04 pm - 12:30 amGEG Spokane-SAT San Antonio

5h 26m1 stop Salt Lake City

$492Delta

Wed, Sep 23 - Thu, Oct 29

6:07 pm - 10:54 pmSAT San Antonio-GEG Spokane

6h 47m1 stop Minneapolis St Paul

6:00 am - 1:40 pmGEG Spokane-SAT San Antonio

5h 40m1 stop Salt Lake City

$492Delta

Wed, Sep 23 - Sat, Oct 31

9:10 am - 7:16 pmSAT San Antonio-GEG Spokane

12h 06m2 stops Denver Intl San Francisco

1:10 pm - 9:47 pmGEG Spokane-SAT San Antonio

6h 37m1 stop San Francisco

$529United Airlines

Tue, Sep 22 - Sat, Oct 31

4:39 pm - 9:14 pmSAT San Antonio-GEG Spokane

6h 35m1 stop Denver Intl

7:00 am - 10:51 pmGEG Spokane-SAT San Antonio

13h 51m3 stops San Francisco Los Angeles Houston George Bush Intcntl

$534United Airlines

Wed, Sep 23 - Sat, Oct 31

4:27 pm - 8:25 pmSAT San Antonio-GEG Spokane

5h 58m1 stop Dallas/Fort Worth

12:45 pm - 9:06 pmGEG Spokane-SAT San Antonio

6h 21m1 stop Dallas/Fort Worth

$587American Airlines

Wed, Sep 23 - Tue, Sep 29

6:00 am - 11:55 amSAT San Antonio-GEG Spokane

7h 55m1 stop Dallas/Fort Worth

6:30 am - 6:33 pmGEG Spokane-SAT San Antonio

10h 03m2 stops Phoenix Sky Harbor Intl Dallas/Fort Worth

$592American Airlines

Wed, Sep 23 - Tue, Sep 29

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United Airlines flights from San Antonio to Idaho

Our best United Airlines deals on San Antonio to Idaho flight tickets

United Airlines

Oct 27

SAT8:56 amSan Antonio

8h 46m

2 stops

BOI4:42 pmBoise Air Term. Gowen Fld

Oct 31

BOI6:30 amBoise Air Term. Gowen Fld

5h 16m

1 stop

SAT12:46 pmSan Antonio

$230

United Airlines

Oct 27

SAT2:20 pmSan Antonio

9h 39m

2 stops

BOI10:59 pmBoise Air Term. Gowen Fld

Oct 31

BOI2:51 pmBoise Air Term. Gowen Fld

7h 00m

2 stops

SAT10:51 pmSan Antonio

$284

United Airlines

Oct 21

SAT7:45 amSan Antonio

6h 18m

1 stop

BOI1:03 pmBoise Air Term. Gowen Fld

Oct 24

BOI2:44 pmBoise Air Term. Gowen Fld

7h 07m

2 stops

SAT10:51 pmSan Antonio

$320

Southwest flights from San Antonio to Idaho

Our best Southwest deals on San Antonio to Idaho flight tickets

Southwest

Oct 17

SAT6:10 amSan Antonio

6h 35m

1 stop

BOI11:45 amBoise Air Term. Gowen Fld

Oct 20

BOI6:00 amBoise Air Term. Gowen Fld

8h 20m

1 stop

SAT3:20 pmSan Antonio

$231

Southwest

Oct 17

SAT6:10 amSan Antonio

6h 35m

1 stop

BOI11:45 amBoise Air Term. Gowen Fld

Oct 20

BOI6:35 amBoise Air Term. Gowen Fld

7h 45m

2 stops

SAT3:20 pmSan Antonio

$237

Southwest

Oct 16

SAT8:35 pmSan Antonio

5h 30m

1 stop

BOI1:05 amBoise Air Term. Gowen Fld

Oct 20

BOI6:00 amBoise Air Term. Gowen Fld

8h 20m

1 stop

SAT3:20 pmSan Antonio

$254

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San AntonioBoise

SAT San Antonio - BOI Boise Air Term. Gowen Fld

SATBOI

San Antonio

Tue 10/27

8:56 am-4:42 pm

2 stops8h 46m

Boise Air Term. Gowen Fld

Sat 10/31

6:30 am-12:46 pm

1 stop5h 16m

$230

San AntonioBoise

SAT San Antonio - BOI Boise Air Term. Gowen Fld

SATBOI

San Antonio

Sat 11/21

10:11 pm-7:00 pm

1 stop21h 49m

Boise Air Term. Gowen Fld

Mon 12/7

9:51 pm-9:34 pm

1 stop22h 43m

$230

San AntonioBoise

SAT San Antonio - BOI Boise Air Term. Gowen Fld

SATBOI

San Antonio

Sat 10/17

6:10 am-11:45 am

1 stop6h 35m

Boise Air Term. Gowen Fld

Tue 10/20

6:00 am-3:20 pm

1 stop8h 20m

$231

San AntonioBoise

SAT San Antonio - BOI Boise Air Term. Gowen Fld

SATBOI

San Antonio

Sat 10/17

6:10 am-11:45 am

1 stop6h 35m

Boise Air Term. Gowen Fld

Tue 10/20

6:35 am-3:20 pm

2 stops7h 45m

$237

San AntonioBoise

SAT San Antonio - BOI Boise Air Term. Gowen Fld

SATBOI

San Antonio

Tue 10/27

2:20 pm-10:59 pm

2 stops9h 39m

Boise Air Term. Gowen Fld

Sat 10/31

2:51 pm-10:51 pm

2 stops7h 00m

$284

San AntonioBoise

SAT San Antonio - BOI Boise Air Term. Gowen Fld

SATBOI

San Antonio

Mon 10/5

4:34 pm-10:57 pm

1 stop7h 23m

Boise Air Term. Gowen Fld

Fri 10/9

2:50 pm-9:49 pm

1 stop5h 59m

$290

San AntonioBoise

SAT San Antonio - BOI Boise Air Term. Gowen Fld

SATBOI

San Antonio

Wed 10/21

7:00 pm-11:59 pm

1 stop5h 59m

Boise Air Term. Gowen Fld

Sat 10/24

2:41 pm-11:59 pm

1 stop8h 18m

$291

San AntonioSpokane

SAT San Antonio - GEG Spokane

SATGEG

San Antonio

Wed 10/21

7:50 am-3:44 pm

1 stop9h 54m

Spokane

Mon 10/26

5:04 pm-12:30 am

1 stop5h 26m

$294

Quickest round-trip

San AntonioBoise

SAT San Antonio - BOI Boise Air Term. Gowen Fld

SATBOI

San Antonio

Fri 12/25

7:45 am-12:20 pm

1 stop5h 35m

Boise Air Term. Gowen Fld

Wed 12/30

7:35 am-2:56 pm

1 stop6h 21m

$317

San AntonioSpokane

SAT San Antonio - GEG Spokane

SATGEG

San Antonio

Tue 10/20

6:00 am-11:59 am

1 stop7h 59m

Spokane

Tue 10/27

12:49 pm-8:35 pm

1 stop5h 46m

$377

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

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

Prices

Airlines

What is the cheapest month to fly to Idaho?

In general, January is the cheapest month to fly from San Antonio to Idaho. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $322. If you don’t want to visit Idaho in January, then you should wait until February to fly from San Antonio, when ticket prices are also cheap, with an average price of $376.

Can stopping save me money on San Antonio to Idaho flights?

You could potentially save up to 58% on your flight if you consider stops on a San Antonio to Idaho flight.

Cheap San Antonio to Idaho flight deals and tips

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

Best Price Found	$104
Fastest flight time	4h 44m
Direct flights	None

The best one-way flight to Idaho from San Antonio in the past 72 hours is $104. The best round-trip flight deal from San Antonio to Idaho found on momondo in the last 72 hours is $230.

The fastest flight from San Antonio to Idaho takes 4h 44m

There are no direct flights from San Antonio to Idaho. There are no popular flight routes from San Antonio to Idaho.

Search flight deals

Frequently asked questions about flying from San Antonio to Idaho

When did momondo last update prices for flights from San Antonio Airport to Idaho?
Prices for flights from San Antonio Airport to Idaho are updated daily.
How many operators does momondo search for flights from San Antonio Airport to Idaho?
The number of operators available for flights from San Antonio Airport to Idaho is 4 as of September 2026.
How old do you have to be to fly from San Antonio Airport to Idaho?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Antonio Airport to Idaho.
What documentation or ID do you need to fly to Idaho?
The necessary travel and health documents for your Idaho trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from San Antonio to Idaho

Compare and see reviews for airlines that fly from San Antonio to Idaho with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $194	Free Cancellation	Rating 7.8 8,591 reviews	Search Delta flights
Southwest	PriceFrom $271	Free Cancellation	Rating 8.0 4,192 reviews	Search Southwest flights
United Airlines	PriceFrom $316	Free Cancellation	Rating 7.4 10,225 reviews	Search United Airlines flights

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from San Antonio to Idaho. Millions of users trust and use momondo every year so you are in good hands.

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

momondo does allow users to show only those flights to Idaho from San Antonio which offer a flexible booking policy as well as other useful filters and features.

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

momondo provides multiple filters to help you find the best flight to Idaho from San Antonio. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

If you are not ready to book a flight from San Antonio to Idaho now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Idaho and let you know when they change.