$66 Cheap Flights from San Diego (SAN) to Boise (BOI)

View $66 flight on Mon, Aug 25, 2025Opens in a new window

Popular airlines from San Diego Intl. Airport (SAN) to Boise Airport (BOI)

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Cheap Flights from San Diego to Boise (SAN-BOI)

Prices were available within the past 7 days and start at $66 for one-way flights and $117 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Spirit Airlines
Fri, Sep 5 - Sun, Sep 7
SAN
San Diego
BOI
Boise
$117 Roundtrip, found 12 hours ago
$117
Roundtrip
found 12 hours ago
Select Spirit Airlines flight, departing Fri, Sep 5 from San Diego to Boise, returning Sun, Sep 7, priced at $117 found 12 hours ago
Southwest Airlines
Wed, Aug 13 - Wed, Aug 27
SAN
San Diego
BOI
Boise
$119 Roundtrip, found 5 days ago
$119
Roundtrip
found 5 days ago
Select Southwest Airlines flight, departing Wed, Aug 13 from San Diego to Boise, returning Wed, Aug 27, priced at $119 found 5 days ago
Spirit Airlines
Mon, Aug 4 - Fri, Aug 8
SAN
San Diego
BOI
Boise
$124 Roundtrip, found 1 day ago
$124
Roundtrip
found 1 day ago
Select Spirit Airlines flight, departing Mon, Aug 4 from San Diego to Boise, returning Fri, Aug 8, priced at $124 found 1 day ago
Spirit Airlines
Thu, Aug 14 - Mon, Aug 18
SAN
San Diego
BOI
Boise
$131 Roundtrip, found 2 hours ago
$131
Roundtrip
found 2 hours ago
Select Spirit Airlines flight, departing Thu, Aug 14 from San Diego to Boise, returning Mon, Aug 18, priced at $131 found 2 hours ago
Alaska Airlines
Thu, Sep 18 - Tue, Sep 23
SAN
San Diego
BOI
Boise
$133 Roundtrip, found 5 days ago
$133
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Thu, Sep 18 from San Diego to Boise, returning Tue, Sep 23, priced at $133 found 5 days ago
Spirit Airlines
Fri, Sep 26 - Sun, Sep 28
SAN
San Diego
BOI
Boise
$136 Roundtrip, found 3 hours ago
$136
Roundtrip
found 3 hours ago
Select Spirit Airlines flight, departing Fri, Sep 26 from San Diego to Boise, returning Sun, Sep 28, priced at $136 found 3 hours ago
Southwest Airlines
Wed, Sep 3 - Fri, Sep 5
SAN
San Diego
BOI
Boise
$137 Roundtrip, found 12 hours ago
$137
Roundtrip
found 12 hours ago
Select Southwest Airlines flight, departing Wed, Sep 3 from San Diego to Boise, returning Fri, Sep 5, priced at $137 found 12 hours ago
Spirit Airlines
Fri, Sep 19 - Sun, Sep 21
SAN
San Diego
BOI
Boise
$138 Roundtrip, found 12 hours ago
$138
Roundtrip
found 12 hours ago
Select Spirit Airlines flight, departing Fri, Sep 19 from San Diego to Boise, returning Sun, Sep 21, priced at $138 found 12 hours ago
Delta
Sat, Aug 16 - Mon, Aug 18
SAN
San Diego
BOI
Boise
$147 Roundtrip, found 6 hours ago
$147
Roundtrip
found 6 hours ago
Select Delta flight, departing Sat, Aug 16 from San Diego to Boise, returning Mon, Aug 18, priced at $147 found 6 hours ago
United
Tue, Dec 16 - Wed, Dec 17
SAN
San Diego
BOI
Boise
$148 Roundtrip, found 6 days ago
$148
Roundtrip
found 6 days ago
Select United flight, departing Tue, Dec 16 from San Diego to Boise, returning Wed, Dec 17, priced at $148 found 6 days ago

Find the cheapest month to fly from San Diego (SAN) to Boise (BOI)

September is typically the cheapest month to fly

From $89 - $246 per traveler.

Graph displaying average flight prices per month

Flights from San Diego (SAN) to Boise (BOI)
Origin airport
San Diego Intl.
Destination airport
Boise
Airlines serving
Alaska Airlines, American Airlines, Delta, Southwest Airlines, Spirit Airlines, United
Roundtrip price
$117
Distance
750 mi
Average flight time
3 hours 13 mins

San Diego to Boise Flights

The cheapest times to fly from San Diego to Boise

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from San Diego to Boise are during the month of September. You can find some of the cheapest flights from San Diego to Boise with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from San Diego to Boise

Sunday is one of the best days to book for cheap flights from San Diego to Boise: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from San Diego to Boise

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from San Diego to Boise in 2025. You can also book with separate airlines for your outbound and return journeys, from $66 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap San Diego to Boise flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your San Diego to Boise airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from San Diego Intl. Airport (SAN) to Boise Airport (BOI) cost?
You can pick up cheap return flights starting from $114 from San Diego Intl. Airport (SAN) to Boise Airport (BOI). This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Southwest Airlines flight leaving SAN on August 5 2025 and touching down at BOI. The price was last updated on July 13 2025 and has not changed since.
What is the cheapest month to fly from SAN to BOI?
The cheapest flights from SAN to BOI are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from San Diego Intl. Airport (SAN) to Boise Airport (BOI)?
You can travel nonstop from San Diego Intl. Airport (SAN) to Boise Airport (BOI) on an Alaska Airlines flight.
What is the cheapest airline that flies from SAN to BOI?
Take off from SAN to BOI with Southwest Airlines. This airline currently has the cheapest one-way ticket on this route, starting at $57. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from SAN on October 8 2025. Prices were last updated on July 13 2025 and have not changed since.
How many flights per day from San Diego Intl. Airport (SAN) to Boise Airport (BOI)?
When taking off from San Diego Intl. Airport (SAN), you can take your pick from an average of 2 daily direct flights to Boise Airport (BOI).
What are the most popular departure times for flights from San Diego Intl. Airport (SAN) to Boise Airport (BOI)?
Flights between SAN and BOI are their busiest at 8 AM. For a more relaxed trip and possibly cheaper prices, choose a departure outside the usual busy windows.
What day of the week has the most flights from SAN to BOI?
Depart on a Sunday if you're looking for the biggest selection of flights from San Diego Intl. Airport (SAN) to Boise Airport (BOI).
What is the earliest flight from San Diego Intl. Airport (SAN) to Boise Airport (BOI)?
The earliest flight out of San Diego Intl. Airport (SAN) is at around 8:15AM UTC-8. Board this flight and you'll arrive at Boise Airport (BOI) at approximately 11:34AM UTC-7. The total travel time is 2h 19m.
How long does it take to fly from San Diego Intl. Airport (SAN) to Boise Airport (BOI)?
The average flight time from SAN to BOI is 2 hours and 18 minutes, covering a total distance of 750 mi.
What airline has the least delays from SAN to BOI?
Alaska Airlines has the best performance for on-time direct flights from San Diego Intl. Airport (SAN) to Boise Airport (BOI), with an on-time score of 82%. Use the Expedia App to look up your flight status before you take off and get notified of any trip changes.
What is the best time to fly from San Diego Intl. Airport (SAN) to Boise Airport (BOI)?
To avoid potential delays on the San Diego Intl. Airport (SAN) to Boise Airport (BOI) route, fly before 3 PM. Departures after this time have a 22% higher chance of being canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Boise from San Diego Intl. Airport (SAN)?
Compare your flight options from San Diego Intl. Airport (SAN) to Boise Airport (BOI). This is the only airport in Boise you can land at if you're taking a direct flight.
Is it cheaper to buy a plane ticket from San Diego Intl. Airport (SAN) to Boise Airport (BOI) last-minute?
Last-minute bookings from SAN to BOI are usually more expensive. To lock in the lowest prices, start looking for flights well in advance. That said, if you can play around with your travel dates, you may find a cheap fare right before your journey.
Is it cheaper to book a SAN to BOI flight and hotel package?
You'll generally save money by securing a SAN to BOI flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one convenient place. Once you've selected your preferred flights and accommodations, you can add extras such as car rentals, tours and activities.
Can I cancel or change the date of my flight from San Diego Intl. Airport (SAN) to Boise Airport (BOI)?
It's generally possible to cancel or reschedule your SAN to BOI flight. However, if it's been more than 24 hours since booking, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find more details on our Customer Service portal.

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*Available to One Key members.