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$128+ Cheap flights from Idaho to San Antonio (SAT)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/31. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SAT
Jan 20 — Jan 271
Tue 1/20
Tue 1/27
1 adult, Economy
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Cheap flight deals from Idaho to San Antonio

Cheapest flights from Idaho to San Antonio
Explore the most affordable flight options available from Idaho to San Antonio. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 21, 2025.

This Frontier deal was found by Cheapflights users on 12/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2812:38 pmBOI - SAT
1 stop10h 39mFrontier
Thu 1/16:45 amSAT - BOI
1 stop5h 58mFrontier
Deal found 12/20$337
This Delta deal was found by Cheapflights users on 12/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:30 amBOI - SAT
1 stop6h 40mDelta
Tue 1/62:42 pmSAT - BOI
1 stop7h 13mDelta
Deal found 12/19$401
This Delta deal was found by Cheapflights users on 12/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/235:40 pmJAC - SAT
1 stop6h 02mDelta
Sun 1/42:40 pmSAT - JAC
1 stop7h 49mDelta
Deal found 12/21$404
This Southwest deal was found by Cheapflights users on 12/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3112:05 pmBOI - SAT
1 stop9h 10mSouthwest
Tue 1/67:15 amSAT - BOI
2 stops9h 05mSouthwest
Deal found 12/19$412
This Delta deal was found by Cheapflights users on 12/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/222:55 pmJAC - SAT
1 stop7h 40mDelta
Tue 12/306:40 amSAT - JAC
1 stop6h 15mDelta
Deal found 12/19$454
This Frontier deal was found by Cheapflights users on 12/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2012:02 pmGEG - SAT
1 stop10h 15mFrontier
Tue 12/2310:18 amSAT - GEG
1 stop7h 35mFrontier
Deal found 12/19$463
This United Airlines deal was found by Cheapflights users on 12/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/264:05 pmIDA - SAT
1 stop6h 42mUnited Airlines
Tue 12/304:55 pmSAT - IDA
1 stop7h 04mUnited Airlines
Deal found 12/19$531
This United Airlines deal was found by Cheapflights users on 12/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2210:37 amJAC - SAT
2 stops11h 11mUnited Airlines
Tue 12/305:15 amSAT - JAC
2 stops11h 09mUnited Airlines
Deal found 12/19$544
This Southwest deal was found by Cheapflights users on 12/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/285:00 amBOI - SAT
2 stops8h 10mSouthwest
Thu 1/17:40 amSAT - BOI
1 stop11h 10mSouthwest
Deal found 12/20$557
This Orbitz deal was found by Cheapflights users on 12/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2312:02 pmGEG - SAT
1 stop10h 15mMultiple Airlines
Fri 12/266:51 pmSAT - GEG
1 stop7h 41mMultiple Airlines
Deal found 12/19$576
This Kiwi.com deal was found by Cheapflights users on 12/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/299:46 pmBOI - SAT
1 stop14h 30mMultiple Airlines
Sat 1/31:33 pmSAT - BOI
1 stop23h 10mMultiple Airlines
Deal found 12/20$592
This United Airlines deal was found by Cheapflights users on 12/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2710:45 amIDA - SAT
1 stop5h 12mUnited Airlines
Thu 1/18:45 amSAT - IDA
1 stop5h 45mUnited Airlines
Deal found 12/20$596

Find flight deals from Idaho to San Antonio

Keep the following information in mind while searching for Idaho to San Antonio flight deals. Data was last updated December 21, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$188
(Kiwi.com)

One-way from

$128
(Delta)

Popular in

December

Cheapest in

August

Average price

$559
Provider with most accurate pricing for Boise Air Term. Gowen Fld-San Antonio flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boise Air Term. Gowen Fld-San Antonio flights.
Search Deals
From Idaho to San Antonio
Search Deals
One-way flight from Idaho to San Antonio
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($76 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Idaho 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, Cheapflights users made 2,558,603 searches. Data last updated December 21, 2025.
Use the filters below to find and compare flights from Idaho to San Antonio that are best for you.

Fly from

Idaho

Fly to

San Antonio

Route

Depart

Return

Price

BoiseSan Antonio

BOI - SAT

BOISAT

Boise Air Term. Gowen Fld

Mon 1/26

12:07 pm-7:33 pm

1 stop6h 26m

San Antonio

Thu 1/29

8:24 pm-11:12 am

1 stop15h 48m

$188

JacksonSan Antonio

JAC - SAT

JACSAT

Jackson Hole

Sun 1/18

3:51 pm-9:52 pm

1 stop5h 01m

San Antonio

Mon 1/26

6:15 am-1:02 pm

1 stop7h 47m

$257

JacksonSan Antonio

JAC - SAT

JACSAT

Jackson Hole

Wed 2/11

3:55 pm-11:43 pm

1 stop6h 48m

San Antonio

Sat 2/14

2:33 pm-7:04 pm

1 stop5h 31m

$257

BoiseSan Antonio

BOI - SAT

BOISAT

Boise Air Term. Gowen Fld

Sat 1/17

1:42 pm-11:23 pm

1 stop8h 41m

San Antonio

Tue 2/3

6:30 am-1:34 pm

1 stop8h 04m

$273

BoiseSan Antonio

BOI - SAT

BOISAT

Boise Air Term. Gowen Fld

Tue 2/24

5:40 am-5:04 pm

2 stops10h 24m

San Antonio

Sat 2/28

7:35 am-6:22 pm

2 stops11h 47m

$274

BoiseSan Antonio

BOI - SAT

BOISAT

Boise Air Term. Gowen Fld

Tue 2/24

4:55 pm-1:43 pm

2 stops19h 48m

San Antonio

Fri 2/27

5:55 pm-9:50 am

2 stops16h 55m

$274

SpokaneSan Antonio

GEG - SAT

GEGSAT

Spokane

Fri 1/30

1:20 pm-12:41 am

2 stops9h 21m

San Antonio

Mon 2/2

1:03 pm-10:52 pm

2 stops11h 49m

$274

SpokaneSan Antonio

GEG - SAT

GEGSAT

Spokane

Tue 1/27

7:20 am-9:34 pm

2 stops12h 14m

San Antonio

Sat 1/31

2:35 pm-10:52 pm

2 stops10h 17m

$274

BoiseSan Antonio

BOI - SAT

BOISAT

Boise Air Term. Gowen Fld

Sat 1/17

1:58 pm-8:51 pm

1 stop5h 53m

San Antonio

Tue 2/3

6:14 am-2:22 pm

2 stops9h 08m

$278

SpokaneSan Antonio

GEG - SAT

GEGSAT

Spokane

Thu 1/22

9:05 am-5:45 pm

1 stop6h 40m

San Antonio

Sun 1/25

6:46 pm-5:06 pm

1 stop24h 20m

$284

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/19

Showing 1-10 of 44 results
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Best time to book a flight from Idaho to San Antonio

Have a flexible travel schedule? Discover the best time to fly to San Antonio from Idaho with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Idaho to San Antonio

What is the cheapest month to book a flight from Idaho to San Antonio?

Currently, March is the cheapest month in which you can book a flight from Idaho to San Antonio (average of $104). Flying from Idaho to San Antonio in August is currently the most expensive (average of $244). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ID to SAT?

Find hourly flight availability from Idaho to San Antonio. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 21, 2025.

It’s typically best to fly out from Idaho to San Antonio in the evening. Doing so could potentially save you 44% on the flight price compared to flying in the morning, which is usually more expensive.

Related info for your journey

Find useful and relevant information for your journey from Idaho to San Antonio. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to San Antonio from Idaho?

    Most people fly into San Antonio (SAT) if they book a flight to San Antonio from Idaho. San Antonio is conveniently located just 7.6 mi from San Antonio’s city center.

  • How long is the flight from Idaho to San Antonio?

    Frontier, American Airlines, and Delta can get you from Idaho to San Antonio in just under 5h 01m. Your travel time can differ by up to 1h 47m. There are 1183 mi between Idaho and San Antonio. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Idaho to San Antonio one-way?

    One-way options have recently been found by users for as low as $95 on Frontier. Other airlines that offer cheap prices include Delta from $102 and United Airlines from $109 one-way.

  • What are the most popular routes from Idaho to San Antonio?

    When deciding which route to take from Idaho to San Antonio consider Spokane - San Antonio, Idaho Falls Fanning Field - San Antonio or Boise Air Term. Gowen Fld - San Antonio as they are the most popular.

  • Can I find deals for flights from Idaho to San Antonio that include hotel bookings?

    Yes. In addition to deals on Idaho to San Antonio flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Idaho to San Antonio?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Idaho to San Antonio.

  • Can I find deals for business class flights from Idaho to San Antonio?

    Yes. Cheapflights offers flight deals from Idaho to San Antonio by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Idaho to San Antonio?

    Currently, March is the cheapest month in which you can book a flight from Idaho to San Antonio (average of $104). Flying from Idaho to San Antonio in August is currently the most expensive (average of $244). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near San Antonio?

Book flights to San Antonio if you plan to visit one of these locations
New Braunfels
Kerrville

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Alternative routes for Idaho to San Antonio

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Idaho to San Antonio

Discover the top 4 airlines that operate flights from Idaho to San Antonio. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$208Average$438FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$230Average$404FlexibilityNo cancel feeOn-time63%
DeltaCheapest$244Average$395FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$259Average$351FlexibilityNo cancel feeOn-time71%

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