HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
San Diego

$55+ 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 9/20. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SAN
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Idaho to San Diego with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 August 14, 2025.

Round-trip from

$123
(Cheapflightsfares)

One-way from

$55
(FlightHub)

Popular in

November

Cheapest in

August

Average price

$237

Good round-trip deal

$197 or less

Good one-way deal

$158 or less
From Idaho to San Diego
Search Deals
One-way flight from Idaho to San Diego
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($44 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2025
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

Find 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 August 14, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 8/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/42:16 pmBOI - SAN
1 stop5h 26mSpirit Airlines
Sat 9/66:15 amSAN - BOI
1 stop6h 06mSpirit Airlines
Deal found 8/14$123
This Mytrip deal was found by Cheapflights users on 8/13. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/199:26 pmBOI - SAN
1 stop11h 03mSpirit Airlines
Mon 9/226:15 amSAN - BOI
1 stop13h 16mSpirit Airlines
Deal found 8/13$133
This Expedia deal was found by Cheapflights users on 8/12. 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.
Thu 9/182:16 pmBOI - SAN
1 stop10h 18mSpirit Airlines
Sat 9/206:15 amSAN - BOI
1 stop6h 06mSpirit Airlines
Deal found 8/12$135
This Expedia deal was found by Cheapflights users on 8/14. 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.
Thu 9/47:07 amBOI - SAN
Nonstop2h 23mMultiple Airlines
Sat 9/66:15 amSAN - BOI
1 stop6h 06mMultiple Airlines
Deal found 8/14$136
This Hawaiian Airlines deal was found by Cheapflights users on 8/14. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/18:18 pmBOI - SAN
Nonstop2h 22mHawaiian Airlines
Tue 10/77:50 pmSAN - BOI
Nonstop2h 32mHawaiian Airlines
Deal found 8/14$137
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 9/72:16 pmBOI - SAN
1 stop18h 13mSpirit Airlines
Wed 9/107:47 pmSAN - BOI
1 stop16h 34mSpirit Airlines
Deal found 8/14$141
This FlightHub deal was found by Cheapflights users on 8/12. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/182:16 pmBOI - SAN
1 stop10h 18mSpirit Airlines
Sun 9/217:47 pmSAN - BOI
1 stop23h 44mSpirit Airlines
Deal found 8/12$142
This Trip.com deal was found by Cheapflights users on 8/12. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/98:18 pmBOI - SAN
Nonstop2h 22mHawaiian Airlines
Tue 9/168:21 pmSAN - BOI
Nonstop2h 22mHawaiian Airlines
Deal found 8/12$143
This FlightHub deal was found by Cheapflights users on 8/13. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/129:26 pmBOI - SAN
1 stop11h 03mSpirit Airlines
Sun 9/147:47 pmSAN - BOI
1 stop23h 44mSpirit Airlines
Deal found 8/13$144
This FlightHub deal was found by Cheapflights users on 8/14. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/612:48 pmBOI - SAN
1 stop6h 21mSpirit Airlines
Sun 11/97:05 pmSAN - BOI
1 stop15h 18mSpirit Airlines
Deal found 8/14$145
This Kiwi.com deal was found by Cheapflights users on 8/12. 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 9/107:07 amBOI - SAN
Nonstop2h 23mHawaiian Airlines
Wed 9/178:21 pmSAN - BOI
Nonstop2h 22mHawaiian Airlines
Deal found 8/12$146
This Hawaiian Airlines deal was found by Cheapflights users on 8/12. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/27:07 amBOI - SAN
Nonstop2h 23mHawaiian Airlines
Tue 9/98:55 amSAN - BOI
Nonstop2h 23mHawaiian Airlines
Deal found 8/12$147

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 August 14, 2025.
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

Thu 9/4

2:16 pm-6:42 pm

1 stop5h 26m

San Diego

Sat 9/6

6:15 am-1:21 pm

1 stop6h 06m

$123

BoiseSan Diego

BOI - SAN

BOISAN

Boise Air Term. Gowen Fld

Fri 9/12

9:26 pm-7:29 am

1 stop11h 03m

San Diego

Mon 9/15

1:35 pm-8:31 pm

1 stop5h 56m

$133

BoiseSan Diego

BOI - SAN

BOISAN

Boise Air Term. Gowen Fld

Fri 9/19

9:26 pm-7:29 am

1 stop11h 03m

San Diego

Mon 9/22

1:35 pm-8:31 pm

1 stop5h 56m

$133

BoiseSan Diego

BOI - SAN

BOISAN

Boise Air Term. Gowen Fld

Thu 9/4

2:16 pm-6:42 pm

1 stop5h 26m

San Diego

Mon 9/8

6:15 am-8:31 pm

1 stop13h 16m

$133

BoiseSan Diego

BOI - SAN

BOISAN

Boise Air Term. Gowen Fld

Thu 9/18

2:16 pm-11:34 pm

1 stop10h 18m

San Diego

Sat 9/20

6:15 am-1:21 pm

1 stop6h 06m

$135

BoiseSan Diego

BOI - SAN

BOISAN

Boise Air Term. Gowen Fld

Wed 10/15

7:13 am-8:45 am

Nonstop2h 32m

San Diego

Sat 10/18

6:15 am-1:21 pm

1 stop6h 06m

$136

BoiseSan Diego

BOI - SAN

BOISAN

Boise Air Term. Gowen Fld

Thu 9/4

7:07 am-8:30 am

Nonstop2h 23m

San Diego

Sat 9/6

6:15 am-1:21 pm

1 stop6h 06m

$136

BoiseSan Diego

BOI - SAN

BOISAN

Boise Air Term. Gowen Fld

Sat 10/11

2:25 pm-6:30 pm

1 stop5h 05m

San Diego

Wed 10/15

7:58 am-11:34 am

Nonstop2h 36m

$136

BoiseSan Diego

BOI - SAN

BOISAN

Boise Air Term. Gowen Fld

Wed 9/10

12:45 pm-1:55 pm

Nonstop2h 10m

San Diego

Wed 9/17

1:35 pm-4:50 pm

Nonstop2h 15m

$137

BoiseSan Diego

BOI - SAN

BOISAN

Boise Air Term. Gowen Fld

Wed 10/1

8:18 pm-9:40 pm

Nonstop2h 22m

San Diego

Tue 10/7

7:50 pm-11:22 pm

Nonstop2h 32m

$137

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/12

Showing 1-10 of 60 results
1
2
3
...
6

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, August is the cheapest month in which you can book a flight from Idaho to San Diego (average of $286). Flying from Idaho to San Diego in March is currently the most expensive (average of $366). 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 August 14, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Idaho to San Diego as you normally would.

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 August 14, 2025.

The most flights from USID to SAN are scheduled on a Monday (7 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (3 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 18 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    The cheapest airline one-way is Spirit Airlines, with whom users have recently found tickets for as low as $55. However, be on the lookout for offers from Delta and Hawaiian Airlines, 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 (97%), SkyWest Airlines (92%), Alaska Airlines (92%).

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

    The cheapest flight price from Idaho to San Diego is $88. On average you can expect to pay $299. The most popular route, (Spokane - San Diego), can usually be booked for $157.

  • 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, August is the cheapest month in which you can book a flight from Idaho to San Diego (average of $286). Flying from Idaho to San Diego in March is currently the most expensive (average of $366). 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
Coronado
La Mesa
Poway
National City
Lemon Grove
Imperial Beach
Alpine

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Idaho to San Diego

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Los Angeles flights
John F Kennedy Intl to Las Vegas flights
Dallas/Fort Worth to Las Vegas flights
Newark to Los Angeles flights
Newark to Las Vegas flights
O'Hare Intl to Las Vegas flights
John F Kennedy Intl to San Francisco flights
Los Angeles to Las Vegas flights
Dallas/Fort Worth to Los Angeles flights
Seattle to Las Vegas flights
San Francisco to Los Angeles flights
LaGuardia to Los Angeles flights
Seattle to Los Angeles flights
Newark to San Francisco flights
San Jose to Los Angeles flights
Burbank to Las Vegas flights
Atlanta to Las Vegas flights
Los Angeles to San Francisco flights
Hobby to Las Vegas flights
Denver to Las Vegas flights
Santa Ana to Las Vegas flights
Reagan-National to Los Angeles flights
Los Angeles to San Jose flights
Boston to Las Vegas flights
LaGuardia to Las Vegas flights
San Francisco to Ontario flights
Boston to Los Angeles flights
Baltimore to Las Vegas flights
Dulles Intl to Los Angeles flights
O'Hare Intl to Los Angeles flights
Dulles Intl to Las Vegas flights
Ontario to San Francisco flights
Seattle to San Francisco flights
San Francisco to Las Vegas flights
Oakland to Las Vegas flights
Los Angeles to Oakland flights
Fort Lauderdale to Las Vegas flights
Seattle to Ontario flights
Dulles Intl to San Francisco flights
Oakland to Los Angeles flights
Santa Ana to San Francisco flights
LaGuardia to San Francisco flights
San Jose to Las Vegas flights
Dallas/Fort Worth to San Francisco flights
John F Kennedy Intl to Ontario flights
George Bush Intcntl to Las Vegas flights
Orlando to Las Vegas flights
Reagan-National to San Francisco flights
Philadelphia to Las Vegas flights
Reagan-National to Las Vegas flights

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 August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$96Average$179FlexibilityNo cancel feeOn-time65%
Hawaiian AirlinesCheapest$138Average$302FlexibilityNo cancel feeOn-time85%
DeltaCheapest$156Average$389FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$174Average$319FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$177Average$303FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$186Average$335FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.