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$47+ Cheap flights from Idaho to San Diego (SAN)

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 5/6. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SAN
Mar 9 — Mar 161
Mon 3/9
Mon 3/16
1 adult, Economy
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Cheap flight deals from Idaho to San Diego

Cheapest flights from Idaho to San Diego
Explore the most affordable flight options available from Idaho to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 7, 2026.

This Alaska Airlines deal was found by Cheapflights users on 2/5. 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.
Sat 4/118:04 pm
BOI
-
SAN
Nonstop2h 19m
Alaska Airlines
Sat 4/188:18 pm
SAN
-
BOI
Nonstop2h 29m
Alaska Airlines
Deal found 2/5$157
This Southwest deal was found by Cheapflights users on 2/5. 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.
Sat 3/287:10 am
BOI
-
SAN
Nonstop2h 20m
Southwest
Tue 3/317:35 am
SAN
-
BOI
1 stop4h 15m
Southwest
Deal found 2/5$163
This Alaska Airlines deal was found by Cheapflights users on 2/5. 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.
Sat 2/286:00 pm
BOI
-
SAN
1 stop6h 44m
Alaska Airlines
Wed 3/48:04 pm
SAN
-
BOI
Nonstop2h 26m
Alaska Airlines
Deal found 2/5$167
This Alaska Airlines deal was found by Cheapflights users on 2/4. 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 4/2910:30 am
GEG
-
SAN
Nonstop2h 48m
Alaska Airlines
Mon 5/46:15 am
SAN
-
GEG
1 stop8h 01m
Alaska Airlines
Deal found 2/4$167
This Kiwi.com deal was found by Cheapflights users on 2/6. 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.
Sun 3/812:15 pm
BOI
-
SAN
1 stop12h 53m
Frontier
Wed 3/118:25 am
SAN
-
BOI
1 stop25h 55m
Frontier
Deal found 2/6$169
This Kiwi.com deal was found by Cheapflights users on 2/5. 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.
Fri 2/2711:56 am
BOI
-
SAN
1 stop13h 12m
Frontier
Wed 3/48:45 am
SAN
-
BOI
1 stop26h 06m
Frontier
Deal found 2/5$172
This Alaska Airlines deal was found by Cheapflights users on 2/5. 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.
Tue 3/37:00 am
GEG
-
SAN
Nonstop2h 55m
Alaska Airlines
Wed 3/49:00 pm
SAN
-
GEG
Nonstop2h 59m
Alaska Airlines
Deal found 2/5$174
This Alaska Airlines deal was found by Cheapflights users on 2/5. 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.
Sat 2/286:00 pm
BOI
-
SAN
1 stop6h 44m
Alaska Airlines
Tue 3/38:04 am
SAN
-
BOI
1 stop4h 18m
Alaska Airlines
Deal found 2/5$177
This Delta deal was found by Cheapflights users on 2/7. 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 4/293:30 pm
GEG
-
SAN
1 stop6h 59m
Delta
Mon 5/47:20 am
SAN
-
GEG
1 stop7h 29m
Delta
Deal found 2/7$177
This Alaska Airlines deal was found by Cheapflights users on 2/4. 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 2/2512:00 pm
GEG
-
SAN
1 stop6h 30m
Alaska Airlines
Wed 2/259:00 pm
SAN
-
GEG
Nonstop2h 59m
Alaska Airlines
Deal found 2/4$178
This Southwest deal was found by Cheapflights users on 2/7. 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 4/27:30 am
BOI
-
SAN
Nonstop2h 15m
Southwest
Tue 4/74:30 pm
SAN
-
BOI
2 stops6h 55m
Southwest
Deal found 2/7$182
This Southwest deal was found by Cheapflights users on 2/5. 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.
Sat 3/71:35 pm
GEG
-
SAN
1 stop5h 05m
Southwest
Sat 3/1411:25 am
SAN
-
GEG
Nonstop2h 50m
Southwest
Deal found 2/5$182

Find flight deals from Idaho to San Diego

Keep the following information in mind while searching for Idaho to San Diego flight deals. Data was last updated February 7, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$157
(CheapOair)

One-way from

$47
(Alaska Airlines)

Popular in

March

Cheapest in

October

Average price

$262

Good round-trip deal

$218 or less

Good one-way deal

$168 or less
Provider with most accurate pricing for Boise Air Term. Gowen Fld-San Diego flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boise Air Term. Gowen Fld-San Diego flights.
Search Deals
From Idaho to San Diego
Search Deals
One-way flight from Idaho to San Diego
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($9 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals
Price to beat on a round-trip flight from Idaho to San Diego.
Search Deals
Price to beat on a one-way flight from Idaho to San Diego.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Idaho to San Diego 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 February 7, 2026.
Use the filters below to find and compare flights from Idaho to San Diego that are best for you.

Fly from

Idaho

Fly to

San Diego

Route

Depart

Return

Price

BoiseSan Diego

BOI - SAN

BOISAN

Boise Air Term. Gowen Fld

Sat 4/11

8:04 pm-9:23 pm

Nonstop2h 19m

San Diego

Sat 4/18

8:18 pm-11:47 pm

Nonstop2h 29m

$157

BoiseSan Diego

BOI - SAN

BOISAN

Boise Air Term. Gowen Fld

Wed 2/25

6:05 am-11:50 am

1 stop6h 45m

San Diego

Sat 2/28

11:35 am-2:50 pm

Nonstop2h 15m

$167

BoiseSan Diego

BOI - SAN

BOISAN

Boise Air Term. Gowen Fld

Sun 3/1

7:00 am-8:26 am

Nonstop2h 26m

San Diego

Tue 3/3

8:04 pm-11:30 pm

Nonstop2h 26m

$167

BoiseSan Diego

BOI - SAN

BOISAN

Boise Air Term. Gowen Fld

Sat 2/28

4:02 pm-8:12 pm

1 stop5h 10m

San Diego

Tue 3/3

8:04 pm-11:30 pm

Nonstop2h 26m

$167

BoiseSan Diego

BOI - SAN

BOISAN

Boise Air Term. Gowen Fld

Sun 3/29

6:32 am-7:56 am

Nonstop2h 24m

San Diego

Wed 4/1

8:18 pm-11:47 pm

Nonstop2h 29m

$167

BoiseSan Diego

BOI - SAN

BOISAN

Boise Air Term. Gowen Fld

Sat 2/28

6:00 pm-11:44 pm

1 stop6h 44m

San Diego

Wed 3/4

8:04 pm-11:30 pm

Nonstop2h 26m

$167

BoiseSan Diego

BOI - SAN

BOISAN

Boise Air Term. Gowen Fld

Sat 3/28

4:25 pm-9:25 pm

1 stop6h 00m

San Diego

Tue 3/31

7:35 am-12:50 pm

1 stop4h 15m

$172

SpokaneSan Diego

GEG - SAN

GEGSAN

Spokane

Tue 3/3

7:00 am-9:55 am

Nonstop2h 55m

San Diego

Wed 3/4

9:00 pm-11:59 pm

Nonstop2h 59m

$174

SpokaneSan Diego

GEG - SAN

GEGSAN

Spokane

Wed 4/8

5:00 am-10:17 am

1 stop5h 17m

San Diego

Thu 4/9

7:30 am-1:00 pm

1 stop5h 30m

$177

BoiseSan Diego

BOI - SAN

BOISAN

Boise Air Term. Gowen Fld

Thu 4/2

7:30 am-8:45 am

Nonstop2h 15m

San Diego

Tue 4/7

4:30 pm-12:25 am

2 stops6h 55m

$182

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/5

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

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

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

Currently, March is the cheapest month in which you can book a flight from Idaho to San Diego (average of $76). Flying from Idaho to San Diego in December is currently the most expensive (average of $168). 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 SAN?

Find hourly flight availability from Idaho to San Diego. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated February 7, 2026.

When flying from Idaho to San Diego, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 15% versus a flight at noon.

What is the cheapest day to fly from Idaho to San Diego?

Use this chart to determine the cheapest time to fly round-trip from Idaho to San Diego. Price data was last updated on January 31, 2026.

Travelers seeking maximum savings on their Idaho to San Diego flight should consider departing on Wednesday evenings when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Idaho to San Diego

Explore weekly flight availability from Idaho to San Diego. 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 February 7, 2026.

The most flights from USID to SAN are scheduled on a Wednesday (8 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (4 on average).

Related info for your journey

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

    Most people fly into San Diego (SAN) if they book a flight to San Diego from Idaho. San Diego is conveniently located just 2.6 mi from San Diego’s city center.

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

    This flight path from Idaho to San Diego was viewed by 13 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    Airlines like Alaska Airlines, Southwest, and Delta fly from Idaho to San Diego in about 2h 19m. The time it takes to get you to your destination can typically vary by up to 4h 26m. There are 750 mi between Idaho and San Diego. 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 Idaho to San Diego one-way?

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

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

    While some choose either Boise Air Term. Gowen Fld - San Diego or Idaho Falls Fanning Field - San Diego, Spokane - San Diego is the most popular route from Idaho to San Diego.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Idaho to San Diego on time: Japan Airlines (89%), Alaska Airlines (82%), Hawaiian Airlines (82%).

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

    The cheapest flight price from Idaho to San Diego is $78. On average you can expect to pay $275. The most popular route, (Spokane - San Diego), can usually be booked for $147.

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

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

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

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

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

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

    Currently, March is the cheapest month in which you can book a flight from Idaho to San Diego (average of $76). Flying from Idaho to San Diego in December is currently the most expensive (average of $168). 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 Diego?

Book flights to San Diego if you plan to visit one of these locations
El Cajon
Chula Vista
National City
Coronado
La Mesa
Poway
Julian
Lemon Grove

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Alternative routes for Idaho to San Diego

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Idaho to San Diego

Discover the top 6 airlines that operate flights from Idaho to San Diego. 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 February 7, 2026.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$58Average$179FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$108Average$319FlexibilityNo cancel feeOn-time69%
DeltaCheapest$108Average$392FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$134Average$283FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$142Average$356FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$177Average$295FlexibilityNo cancel feeOn-time63%

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