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$66+ Cheap flights from San Diego (SAN) to Idaho

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 2/25. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — BOI
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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Cheap flight deals from San Diego to Idaho

Cheapest flights from San Diego to Idaho
Explore the most affordable flight options available from San Diego to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 29, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/28. 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.
Wed 3/48:45 am
SAN
-
BOI
1 stop26h 06m
Frontier
Sun 3/812:15 pm
BOI
-
SAN
1 stop9h 18m
Frontier
Deal found 1/28$134
This Kiwi.com deal was found by Cheapflights users on 1/29. 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.
Thu 2/2611:59 am
SAN
-
BOI
1 stop22h 12m
Frontier
Sun 3/111:56 am
BOI
-
SAN
1 stop13h 12m
Frontier
Deal found 1/29$136
This CheapOair deal was found by Cheapflights users on 1/27. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/249:00 pm
SAN
-
GEG
Nonstop2h 59m
Alaska Airlines
Tue 3/37:00 am
GEG
-
SAN
Nonstop2h 55m
Alaska Airlines
Deal found 1/27$137
This Expedia deal was found by Cheapflights users on 1/27. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/179:00 pm
SAN
-
GEG
Nonstop2h 59m
Alaska Airlines
Wed 2/257:00 am
GEG
-
SAN
Nonstop2h 55m
Alaska Airlines
Deal found 1/27$147
This Alaska Airlines deal was found by Cheapflights users on 1/28. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/258:04 pm
SAN
-
BOI
Nonstop2h 26m
Alaska Airlines
Sat 2/287:31 pm
BOI
-
SAN
Nonstop2h 28m
Alaska Airlines
Deal found 1/28$157
This Southwest deal was found by Cheapflights users on 1/27. 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.
Tue 2/244:20 pm
SAN
-
GEG
1 stop5h 25m
Southwest
Tue 3/35:35 am
GEG
-
SAN
1 stop6h 25m
Southwest
Deal found 1/27$157
This Southwest deal was found by Cheapflights users on 1/27. 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.
Tue 3/32:20 pm
SAN
-
BOI
2 stops6h 55m
Southwest
Sat 3/77:10 am
BOI
-
SAN
Nonstop2h 20m
Southwest
Deal found 1/27$172
This CheapOair deal was found by Cheapflights users on 1/28. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/2812:23 pm
SAN
-
GEG
1 stop23h 51m
Frontier
Thu 3/512:22 pm
GEG
-
SAN
1 stop19h 43m
Frontier
Deal found 1/28$174
This CheapOair deal was found by Cheapflights users on 1/27. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/79:00 pm
SAN
-
GEG
Nonstop2h 59m
Alaska Airlines
Wed 3/116:20 am
GEG
-
SAN
Nonstop2h 59m
Alaska Airlines
Deal found 1/27$175
This Southwest deal was found by Cheapflights users on 1/28. 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.
Thu 2/262:25 pm
SAN
-
BOI
Nonstop2h 15m
Southwest
Sun 3/14:25 pm
BOI
-
SAN
Nonstop2h 10m
Southwest
Deal found 1/28$177
This Delta deal was found by Cheapflights users on 1/28. 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.
Sat 2/281:40 pm
SAN
-
GEG
1 stop5h 15m
Delta
Sun 3/15:00 am
GEG
-
SAN
1 stop5h 04m
Delta
Deal found 1/28$177
This Southwest deal was found by Cheapflights users on 1/27. 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.
Tue 2/247:10 am
SAN
-
BOI
2 stops6h 10m
Southwest
Tue 3/311:50 am
BOI
-
SAN
1 stop5h 05m
Southwest
Deal found 1/27$182

Find flight deals from San Diego to Idaho

Keep the following information in mind while searching for San Diego to Idaho flight deals. Data was last updated January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$134
(Kiwi.com)

One-way from

$66
(Kiwi.com)

Popular in

March

Cheapest in

September

Average price

$299

Good round-trip deal

$177 or less

Good one-way deal

$108 or less
Provider with most accurate pricing for San Diego-Boise Air Term. Gowen Fld flight deals.
Search Deals
Provider most trusted by Cheapflights users for San Diego-Boise Air Term. Gowen Fld flights.
Search Deals
From San Diego to Idaho
Search Deals
One-way flight from San Diego to Idaho
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($31 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals
Price to beat on a round-trip flight from San Diego to Idaho.
Search Deals
Price to beat on a one-way flight from San Diego to Idaho.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from San Diego to Idaho 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 January 29, 2026.
Use the filters below to find and compare flights from San Diego to Idaho that are best for you.

Fly from

San Diego

Fly to

Idaho

Route

Depart

Return

Price

San DiegoBoise

SAN - BOI

SANBOI

San Diego

Sat 4/4

8:18 pm-11:47 pm

Nonstop2h 29m

Boise Air Term. Gowen Fld

Tue 4/7

8:04 pm-9:23 pm

Nonstop2h 19m

$157

San DiegoSpokane

SAN - GEG

SANGEG

San Diego

Sat 2/28

5:20 pm-10:42 pm

1 stop5h 22m

Spokane

Tue 3/3

1:25 pm-5:50 pm

1 stop4h 25m

$157

San DiegoBoise

SAN - BOI

SANBOI

San Diego

Wed 2/25

8:04 pm-11:30 pm

Nonstop2h 26m

Boise Air Term. Gowen Fld

Sat 2/28

7:31 pm-8:59 pm

Nonstop2h 28m

$157

San DiegoSpokane

SAN - GEG

SANGEG

San Diego

Tue 2/24

9:00 pm-11:59 pm

Nonstop2h 59m

Spokane

Tue 3/3

12:00 pm-6:30 pm

1 stop6h 30m

$157

San DiegoBoise

SAN - BOI

SANBOI

San Diego

Tue 3/3

2:20 pm-11:10 pm

1 stop7h 50m

Boise Air Term. Gowen Fld

Sat 3/7

7:10 am-8:30 am

Nonstop2h 20m

$167

San DiegoBoise

SAN - BOI

SANBOI

San Diego

Fri 2/27

8:04 pm-11:30 pm

Nonstop2h 26m

Boise Air Term. Gowen Fld

Sat 2/28

7:00 am-8:26 am

Nonstop2h 26m

$167

San DiegoBoise

SAN - BOI

SANBOI

San Diego

Wed 3/4

8:04 pm-11:30 pm

Nonstop2h 26m

Boise Air Term. Gowen Fld

Sun 3/8

7:00 am-8:26 am

Nonstop2h 26m

$167

San DiegoBoise

SAN - BOI

SANBOI

San Diego

Sat 3/7

8:04 pm-11:30 pm

Nonstop2h 26m

Boise Air Term. Gowen Fld

Mon 3/9

7:00 am-8:26 am

Nonstop2h 26m

$167

San DiegoBoise

SAN - BOI

SANBOI

San Diego

Thu 3/5

7:10 pm-10:30 pm

Nonstop2h 20m

Boise Air Term. Gowen Fld

Tue 3/10

5:55 pm-8:30 pm

1 stop3h 35m

$173

San DiegoSpokane

SAN - GEG

SANGEG

San Diego

Sat 2/28

12:23 pm-12:14 pm

1 stop23h 51m

Spokane

Thu 3/5

12:22 pm-8:05 am

1 stop19h 43m

$174

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Showing 1-10 of 60 results
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Best time to book a flight from San Diego to Idaho

Have a flexible travel schedule? Discover the best time to fly to Idaho from San Diego 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 San Diego to Idaho

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

Currently, November is the cheapest month in which you can book a flight from San Diego to Idaho (average of $60). Flying from San Diego to Idaho in December is currently the most expensive (average of $142). 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 SAN to ID?

Find hourly flight availability from San Diego to Idaho. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 29, 2026.

It’s optimal to fly from San Diego to Idaho at noon. By choosing this option you can save up to 28% on the cost of your flight, compared to a flight in the afternoon.

Weekly flight availability from San Diego to Idaho

Explore weekly flight availability from San Diego to Idaho. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated January 29, 2026.

The most flights from SAN to USID are scheduled on a Monday (4 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (2 on average).

Reviews of airlines servicing Idaho

Get insights into the airlines that provide service to Idaho. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Idaho. Reviews last updated January 29, 2026.
Get a feel of what it's like to fly with Alaska Airlines, Southwest, and Delta from San Diego to Idaho by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,807 reviews

Overall

8.0

Crew

8.5

Comfort

7.8

Boarding

8.1

Entertainment

7.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Alaska Airlines
8.0
Very good
11,807 reviews
Alaska Airlines
8.0
Very good
11,807 reviews

Overall

8.0

Crew

8.5

Comfort

7.8

Boarding

8.1

Entertainment

7.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Southwest
8.0
Very good
4,267 reviews
Alaska Airlines
8.0
Very good
11,807 reviews

Overall

8.0

Crew

8.5

Comfort

7.8

Boarding

8.1

Entertainment

7.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Delta
7.9
Good
8,128 reviews
Alaska Airlines
8.0
Very good
11,807 reviews

Overall

8.0

Crew

8.5

Comfort

7.8

Boarding

8.1

Entertainment

7.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Hawaiian Airlines
7.8
Good
2,830 reviews
Alaska Airlines
8.0
Very good
11,807 reviews

Overall

8.0

Crew

8.5

Comfort

7.8

Boarding

8.1

Entertainment

7.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
United Airlines
7.4
Good
9,215 reviews
Alaska Airlines
8.0
Very good
11,807 reviews

Overall

8.0

Crew

8.5

Comfort

7.8

Boarding

8.1

Entertainment

7.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading

Related info for your journey

Find useful and relevant information for your journey from San Diego to Idaho. 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 from for flights from San Diego to Idaho?

    For a flight from San Diego to Idaho, you will be flying from San Diego. San Diego (SAN) is just 2.6 mi from the center of the city.

  • How popular is this San Diego to Idaho flight route?

    Flights from San Diego to Idaho have been viewed 7 times in the past calendar month.

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

    Airlines like Alaska Airlines, Delta, and Southwest fly from San Diego to Idaho in about 2h 29m. The time it takes to get you to your destination can typically vary by up to 5h 21m. San Diego and Idaho are separated by a distance of 750 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    The cheapest airline one-way is Delta, with whom users have recently found tickets for as low as $78. However, be on the lookout for offers from Alaska Airlines and Southwest, as they are both options that can get you from San Diego to Idaho for a low price.

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

    Most travelers choose San Diego - Boise Air Term. Gowen Fld, San Diego - Spokane or San Diego - Jackson Hole when deciding on the best route from San Diego to Idaho.

  • What are the most reliable airlines from San Diego to Idaho?

    The top 3 most reliable airlines when flying from San Diego to Idaho are Southwest (80%), SkyWest Airlines (80%) and Alaska Airlines (79%).

  • What are the cheapest flights from San Diego to Idaho?

    Looking at all options, your cheapest flight can be booked for $78. While the most popular route (San Diego - Boise Air Term. Gowen Fld) can be booked for $158 on average, our data indicates $205 when flying from San Diego to Idaho.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from San Diego to Idaho 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 San Diego to Idaho?

    Currently, November is the cheapest month in which you can book a flight from San Diego to Idaho (average of $60). Flying from San Diego to Idaho in December is currently the most expensive (average of $142). 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

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Alternative routes for San Diego to Idaho

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from San Diego to Idaho

Discover the top 5 airlines that operate flights from San Diego to Idaho. 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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$144Average$377FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$155Average$277FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$157Average$316FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$157Average$274FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$185Average$419FlexibilityNo cancel feeOn-time69%

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