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

Frontier, Spirit Airlines, and Alaska Airlines 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 36% 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 5 as of July 2025.

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.

$117 Cheap Flights from San Antonio to Idaho in 2025

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Find the cheapest flights from San Antonio to Idaho

Round-trip

One-way

Last minute

Cheap round-trip flights

5:42 pm - 8:31 pmSAT-BOI

27h 49m1 stop

9:26 pm - 8:52 pmBOI-SAT

22h 26m1 stop

$224Spirit Airlines

Find Deal

Thu, Sep 4 - Mon, Sep 8

6:59 pm - 11:46 amSAT-BOI

17h 47m1 stop

12:33 pm - 7:33 pmBOI-SAT

6h 00m1 stop

$235Frontier

Find Deal

Sat, Aug 16 - Sun, Aug 31

1:44 pm - 6:39 pmSAT-GEG

6h 55m1 stop

7:00 am - 5:49 pmGEG-SAT

8h 49m1 stop

$265American Airlines

Find Deal

Wed, Sep 17 - Mon, Sep 22

2:14 pm - 11:29 pmSAT-GEG

11h 15m2 stops

1:47 pm - 10:27 pmGEG-SAT

6h 40m1 stop

$270United Airlines

Find Deal

Fri, Oct 31 - Mon, Nov 3

6:00 am - 12:48 pmSAT-BOI

7h 48m1 stop

1:57 pm - 11:00 pmBOI-SAT

8h 03m2 stops

$273American Airlines

Find Deal

Thu, Sep 4 - Tue, Sep 9

6:05 pm - 11:35 pmSAT-GEG

7h 30m1 stop

6:00 am - 12:19 amGEG-SAT

16h 19m2 stops

$285Delta

Find Deal

Tue, Sep 23 - Sat, Oct 4

6:05 pm - 11:35 pmSAT-GEG

7h 30m1 stop

5:00 am - 11:17 pmGEG-SAT

16h 17m2 stops

$291Delta

Find Deal

Mon, Sep 22 - Sat, Oct 4

5:00 pm - 12:05 amSAT-BOI

8h 05m2 stops

4:30 pm - 10:55 pmBOI-SAT

5h 25m1 stop

$323Southwest

Find Deal

Fri, Aug 22 - Mon, Aug 25

2:10 pm - 12:05 amSAT-BOI

10h 55m1 stop

5:45 am - 3:15 pmBOI-SAT

8h 30m1 stop

$354Southwest

Find Deal

Fri, Aug 29 - Fri, Sep 5

2:15 pm - 11:08 pmSAT-GEG

10h 53m2 stops

12:35 pm - 10:17 pmGEG-SAT

7h 42m1 stop

$393United Airlines

Find Deal

Sun, Aug 17 - Tue, Aug 19

Frontier flights from San Antonio to Idaho

Our best Frontier deals on San Antonio to Idaho flight tickets

Frontier

Aug 16

SAT6:59 pmSan Antonio

17h 47m

1 stop

BOI11:46 amBoise Air Term. Gowen Fld

Aug 31

BOI12:33 pmBoise Air Term. Gowen Fld

6h 00m

1 stop

SAT7:33 pmSan Antonio

$235

Find similar

Frontier

Aug 2

SAT6:59 pmSan Antonio

17h 47m

1 stop

BOI11:46 amBoise Air Term. Gowen Fld

Aug 7

BOI12:36 pmBoise Air Term. Gowen Fld

5h 37m

1 stop

SAT7:13 pmSan Antonio

$371

Find similar

Frontier

Aug 2

SAT6:59 pmSan Antonio

17h 47m

1 stop

BOI11:46 amBoise Air Term. Gowen Fld

Aug 7

BOI12:36 pmBoise Air Term. Gowen Fld

5h 37m

1 stop

SAT7:13 pmSan Antonio

$391

Find similar

Southwest flights from San Antonio to Idaho

Our best Southwest deals on San Antonio to Idaho flight tickets

Southwest

Aug 22

SAT5:00 pmSan Antonio

8h 05m

2 stops

BOI12:05 amBoise Air Term. Gowen Fld

Aug 25

BOI4:30 pmBoise Air Term. Gowen Fld

5h 25m

1 stop

SAT10:55 pmSan Antonio

$323

Find similar

Southwest

Aug 29

SAT2:10 pmSan Antonio

10h 55m

1 stop

BOI12:05 amBoise Air Term. Gowen Fld

Sep 5

BOI5:45 amBoise Air Term. Gowen Fld

8h 30m

1 stop

SAT3:15 pmSan Antonio

$354

Find similar

Southwest

Oct 9

SAT8:25 pmSan Antonio

4h 55m

1 stop

BOI12:20 amBoise Air Term. Gowen Fld

Oct 13

BOI5:30 amBoise Air Term. Gowen Fld

5h 10m

1 stop

SAT11:40 amSan Antonio

$355

Find similar

Fly from

Fly to

Route

Depart

Return

Price

San AntonioBoise

SAT - BOI

SATBOI

San Antonio

Thu 9/4

5:42 pm-8:31 pm

1 stop27h 49m

Boise Air Term. Gowen Fld

Mon 9/8

9:26 pm-8:52 pm

1 stop22h 26m

$224

San AntonioBoise

SAT - BOI

SATBOI

San Antonio

Sat 8/16

6:59 pm-11:46 am

1 stop17h 47m

Boise Air Term. Gowen Fld

Sun 8/31

12:33 pm-7:33 pm

1 stop6h 00m

$235

San AntonioSpokane

SAT - GEG

SATGEG

San Antonio

Wed 9/17

1:44 pm-6:39 pm

1 stop6h 55m

Spokane

Mon 9/22

7:00 am-5:49 pm

1 stop8h 49m

$265

San AntonioSpokane

SAT - GEG

SATGEG

San Antonio

Fri 10/31

2:14 pm-11:29 pm

2 stops11h 15m

Spokane

Mon 11/3

1:47 pm-10:27 pm

1 stop6h 40m

$270

San AntonioBoise

SAT - BOI

SATBOI

San Antonio

Thu 9/4

6:00 am-12:48 pm

1 stop7h 48m

Boise Air Term. Gowen Fld

Tue 9/9

1:57 pm-11:00 pm

2 stops8h 03m

$273

San AntonioSpokane

SAT - GEG

SATGEG

San Antonio

Tue 9/23

6:05 pm-11:35 pm

1 stop7h 30m

Spokane

Sat 10/4

6:00 am-12:19 am

2 stops16h 19m

$285

San AntonioSpokane

SAT - GEG

SATGEG

San Antonio

Mon 9/22

6:05 pm-11:35 pm

1 stop7h 30m

Spokane

Sat 10/4

5:00 am-11:17 pm

2 stops16h 17m

$291

San AntonioBoise

SAT - BOI

SATBOI

San Antonio

Fri 8/22

5:00 pm-12:05 am

2 stops8h 05m

Boise Air Term. Gowen Fld

Mon 8/25

4:30 pm-10:55 pm

1 stop5h 25m

$323

San AntonioBoise

SAT - BOI

SATBOI

San Antonio

Fri 8/29

2:10 pm-12:05 am

1 stop10h 55m

Boise Air Term. Gowen Fld

Fri 9/5

5:45 am-3:15 pm

1 stop8h 30m

$354

San AntonioSpokane

SAT - GEG

SATGEG

San Antonio

Sun 8/17

2:15 pm-11:08 pm

2 stops10h 53m

Spokane

Tue 8/19

12:35 pm-10:17 pm

1 stop7h 42m

$393

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 $308. If you don’t want to visit Idaho in January, then you should wait until August to fly from San Antonio, when ticket prices are also cheap, with an average price of $309.

What is the cheapest day to depart on your flight to Idaho?

Our data shows that Wednesday is the least expensive day to fly to Idaho. Tickets to fly out on this day can be as low as $310. On the other hand, Sunday is the most expensive day to depart from San Antonio because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $505.

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

According to our data, the cheapest time of day to fly to Idaho is at noon. momondo users have found flights departing from San Antonio to Idaho at noon for as low as $369. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In the afternoon is when there is more demand to fly to Idaho, so prices are often more expensive at around $466 per ticket.

How far in advance should I book a flight to Idaho?

You are more likely to see cheaper flights to Idaho from San Antonio when booking weeks ahead of your departure date. In general, you can expect to find flights to Idaho for around $396 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Idaho from San Antonio for as low as $272 on momondo.

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	$117
Fastest flight time	4h 22m
Direct flights	None
Airports in Idaho	4 airports

The best one-way flight to Idaho from San Antonio in the past 72 hours is $117. The best round-trip flight deal from San Antonio to Idaho found on momondo in the last 72 hours is $224.

The fastest flight from San Antonio to Idaho takes 4h 22m

There are no direct flights from San Antonio to Idaho. Popular non-direct routes for this connection are San Antonio Airport - Jackson Hole Airport, San Antonio Airport - Boise Air Term. Gowen Fld Airport and San Antonio Airport - Spokane Airport.

There are 4 airports near Idaho: Idaho Falls Fanning Field (IDA), Spokane (GEG), Boise Air Term. Gowen Fld (BOI), Jackson Hole (JAC)

Search flight deals

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 5 as of July 2025.
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
Spirit Airlines	PriceFrom $116	Free Cancellation	Rating 6.3 8,048 reviews	Search Spirit Airlines flights
Delta	PriceFrom $230	Free Cancellation	Rating 8.0 7,981 reviews	Search Delta flights
American Airlines	PriceFrom $244	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Southwest	PriceFrom $286	Free Cancellation	Rating 8.0 4,246 reviews	Search Southwest flights
United Airlines	PriceFrom $286	Free Cancellation	Rating 7.4 8,900 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.