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

Alaska Airlines, Delta, 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 34% 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.

How many flights depart from San Antonio to Idaho on average per week?

The number of flights available between San Antonio and Idaho is 3 per week as of June 2026. The most frequent departure day is Tue, with 33% of weekly flights leaving on this day.

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 June 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.

$141 Cheap Flights from San Antonio to Idaho in 2026

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.

7:39 pm - 12:29 pm

SAT

BOI

17h 50m

1 stop

1:24 pm - 6:44 pm

BOI

SAT

28h 20m

1 stop

$286Frontier

Wed, Jul 22 - Sun, Jul 26

7:39 pm - 12:29 pm

SAT

BOI

17h 50m

1 stop

1:24 pm - 6:44 pm

BOI

SAT

28h 20m

1 stop

$294Frontier

Sat, Jul 18 - Sun, Jul 26

5:40 am - 9:50 am

SAT

IDA

5h 10m

1 stop

2:25 pm - 8:52 pm

IDA

SAT

5h 27m

1 stop

$329United Airlines

Wed, Aug 5 - Thu, Aug 27

2:45 pm - 10:40 pm

SAT

BOI

8h 55m

2 stops

8:01 am - 4:33 pm

BOI

SAT

7h 32m

1 stop

$338American Airlines

Wed, Aug 26 - Wed, Sep 2

2:45 pm - 10:40 pm

SAT

BOI

8h 55m

2 stops

1:55 pm - 10:50 pm

BOI

SAT

7h 55m

2 stops

$343American Airlines

Wed, Aug 26 - Wed, Sep 2

6:50 am - 10:50 am

SAT

IDA

5h 00m

1 stop

6:00 am - 1:31 pm

IDA

SAT

6h 31m

1 stop

$354Delta

Wed, Aug 5 - Thu, Aug 27

6:50 am - 10:50 am

SAT

IDA

5h 00m

1 stop

6:00 am - 2:57 pm

IDA

SAT

7h 57m

2 stops

$359Delta

Wed, Aug 5 - Thu, Aug 27

6:40 pm - 10:55 pm

SAT

GEG

6h 15m

1 stop

7:00 am - 4:50 pm

GEG

SAT

7h 50m

2 stops

$374Southwest

Tue, Aug 11 - Tue, Aug 25

4:20 pm - 10:25 pm

SAT

GEG

8h 05m

2 stops

7:30 am - 5:55 pm

GEG

SAT

8h 25m

2 stops

$379Southwest

Tue, Aug 11 - Tue, Aug 25

7:35 am - 3:28 pm

SAT

JAC

8h 53m

2 stops

4:25 pm - 11:57 pm

JAC

SAT

6h 32m

1 stop

$380United Airlines

Tue, Sep 15 - Wed, Sep 23

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Alaska Airlines flights from San Antonio to Idaho

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

Alaska Airlines

Jul 28

SAT7:02 amSan Antonio

8h 05m

1 stop

BOI2:07 pmBoise Air Term. Gowen Fld

Aug 4

BOI1:06 pmBoise Air Term. Gowen Fld

14h 54m

1 stop

SAT5:00 amSan Antonio

$333

Alaska Airlines

Aug 25

SAT5:11 pmSan Antonio

7h 14m

1 stop

GEG10:25 pmSpokane

Aug 26

GEG7:03 amSpokane

7h 10m

1 stop

SAT4:13 pmSan Antonio

$369

Alaska Airlines

Nov 10

SAT5:21 pmSan Antonio

7h 21m

1 stop

IDA11:42 pmIdaho Falls Fanning Field

Nov 14

IDA6:04 amIdaho Falls Fanning Field

9h 21m

1 stop

SAT4:25 pmSan Antonio

$379

Southwest flights from San Antonio to Idaho

Our best Southwest deals on San Antonio to Idaho flight tickets

Southwest

Jul 15

SAT8:25 pmSan Antonio

5h 10m

1 stop

BOI12:35 amBoise Air Term. Gowen Fld

Jul 22

BOI11:45 amBoise Air Term. Gowen Fld

11h 50m

2 stops

SAT12:35 amSan Antonio

$359

Southwest

Jul 14

SAT7:55 pmSan Antonio

5h 35m

1 stop

BOI12:30 amBoise Air Term. Gowen Fld

Jul 21

BOI11:45 amBoise Air Term. Gowen Fld

11h 50m

2 stops

SAT12:35 amSan Antonio

$374

Southwest

Aug 11

SAT4:20 pmSan Antonio

8h 05m

2 stops

GEG10:25 pmSpokane

Aug 25

GEG7:30 amSpokane

8h 25m

2 stops

SAT5:55 pmSan Antonio

$379

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San AntonioBoise

SAT - BOI

SATBOI

San Antonio

Wed 7/22

7:39 pm-12:29 pm

1 stop17h 50m

Boise Air Term. Gowen Fld

Sun 7/26

1:24 pm-6:44 pm

1 stop28h 20m

$286

San AntonioBoise

SAT - BOI

SATBOI

San Antonio

Sat 7/18

7:39 pm-12:29 pm

1 stop17h 50m

Boise Air Term. Gowen Fld

Sun 7/26

1:24 pm-6:44 pm

1 stop28h 20m

$294

Quickest round-trip

San AntonioIdaho Falls

SAT - IDA

SATIDA

San Antonio

Wed 8/5

5:40 am-9:50 am

1 stop5h 10m

Idaho Falls Fanning Field

Thu 8/27

2:25 pm-8:52 pm

1 stop5h 27m

$329

San AntonioBoise

SAT - BOI

SATBOI

San Antonio

Wed 8/26

2:45 pm-10:40 pm

2 stops8h 55m

Boise Air Term. Gowen Fld

Wed 9/2

8:01 am-4:33 pm

1 stop7h 32m

$338

San AntonioBoise

SAT - BOI

SATBOI

San Antonio

Wed 8/26

2:45 pm-10:40 pm

2 stops8h 55m

Boise Air Term. Gowen Fld

Wed 9/2

1:55 pm-10:50 pm

2 stops7h 55m

$343

San AntonioIdaho Falls

SAT - IDA

SATIDA

San Antonio

Wed 8/5

6:50 am-10:50 am

1 stop5h 00m

Idaho Falls Fanning Field

Thu 8/27

6:00 am-1:31 pm

1 stop6h 31m

$354

San AntonioIdaho Falls

SAT - IDA

SATIDA

San Antonio

Wed 8/5

6:50 am-10:50 am

1 stop5h 00m

Idaho Falls Fanning Field

Thu 8/27

6:00 am-2:57 pm

2 stops7h 57m

$359

San AntonioSpokane

SAT - GEG

SATGEG

San Antonio

Tue 8/11

6:40 pm-10:55 pm

1 stop6h 15m

Spokane

Tue 8/25

7:00 am-4:50 pm

2 stops7h 50m

$374

San AntonioSpokane

SAT - GEG

SATGEG

San Antonio

Tue 8/11

4:20 pm-10:25 pm

2 stops8h 05m

Spokane

Tue 8/25

7:30 am-5:55 pm

2 stops8h 25m

$379

San AntonioJackson

SAT - JAC

SATJAC

San Antonio

Tue 9/15

7:35 am-3:28 pm

2 stops8h 53m

Jackson Hole

Wed 9/23

4:25 pm-11:57 pm

1 stop6h 32m

$380

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

Other information

What is the cheapest month to fly to Idaho?

In general, September 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 $77. If you don’t want to visit Idaho in September, then you should wait until August to fly from San Antonio, when ticket prices are also cheap, with an average price of $79.

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

You could potentially save up to 15% 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

Fastest flight time	5h 04m
Direct flights	None

The fastest flight from San Antonio to Idaho takes 5h 04m

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 5 as of June 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 8,420 reviews	Search Delta flights
American Airlines	PriceFrom $244	Free Cancellation	Rating 7.1 11,715 reviews	Search American Airlines flights
Southwest	PriceFrom $271	Free Cancellation	Rating 7.9 4,241 reviews	Search Southwest flights
United Airlines	PriceFrom $316	Free Cancellation	Rating 7.4 9,865 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.