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

View $66 flight on Mon, Aug 11, 2025Opens in a new window

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

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

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
Sun, Sep 14 - Mon, Sep 22
BOI
Boise
SAN
San Diego
$117 Roundtrip, found 5 hours ago
$117
Roundtrip
found 5 hours ago
Select Spirit Airlines flight, departing Sun, Sep 14 from Boise to San Diego, returning Mon, Sep 22, priced at $117 found 5 hours ago
Southwest Airlines
Thu, Nov 6 - Sat, Nov 8
BOI
Boise
SAN
San Diego
$119 Roundtrip, found 5 days ago
$119
Roundtrip
found 5 days ago
Select Southwest Airlines flight, departing Thu, Nov 6 from Boise to San Diego, returning Sat, Nov 8, priced at $119 found 5 days ago
Spirit Airlines
Fri, Aug 1 - Thu, Aug 14
BOI
Boise
SAN
San Diego
$124 Roundtrip, found 2 days ago
$124
Roundtrip
found 2 days ago
Select Spirit Airlines flight, departing Fri, Aug 1 from Boise to San Diego, returning Thu, Aug 14, priced at $124 found 2 days ago
Spirit Airlines
Fri, Sep 19 - Sun, Sep 21
BOI
Boise
SAN
San Diego
$130 Roundtrip, found 5 hours ago
$130
Roundtrip
found 5 hours ago
Select Spirit Airlines flight, departing Fri, Sep 19 from Boise to San Diego, returning Sun, Sep 21, priced at $130 found 5 hours ago
Spirit Airlines
Mon, Aug 11 - Thu, Aug 14
BOI
Boise
SAN
San Diego
$131 Roundtrip, just found
$131
Roundtrip
just found
Select Spirit Airlines flight, departing Mon, Aug 11 from Boise to San Diego, returning Thu, Aug 14, priced at $131 just found
Spirit Airlines
Sun, Sep 21 - Sat, Sep 27
BOI
Boise
SAN
San Diego
$133 Roundtrip, just found
$133
Roundtrip
just found
Select Spirit Airlines flight, departing Sun, Sep 21 from Boise to San Diego, returning Sat, Sep 27, priced at $133 just found
Spirit Airlines
Sat, Sep 20 - Fri, Sep 26
BOI
Boise
SAN
San Diego
$134 Roundtrip, just found
$134
Roundtrip
just found
Select Spirit Airlines flight, departing Sat, Sep 20 from Boise to San Diego, returning Fri, Sep 26, priced at $134 just found
Alaska Airlines
Tue, Sep 16 - Mon, Sep 22
BOI
Boise
SAN
San Diego
$144 Roundtrip, just found
$144
Roundtrip
just found
Select Alaska Airlines flight, departing Tue, Sep 16 from Boise to San Diego, returning Mon, Sep 22, priced at $144 just found
United
Tue, Sep 16 - Mon, Sep 22
BOI
Boise
SAN
San Diego
$154 Roundtrip, just found
$154
Roundtrip
just found
Select United flight, departing Tue, Sep 16 from Boise to San Diego, returning Mon, Sep 22, priced at $154 just found
Delta
Wed, Oct 8 - Tue, Oct 14
BOI
Boise
SAN
San Diego
$157 Roundtrip, just found
$157
Roundtrip
just found
Select Delta flight, departing Wed, Oct 8 from Boise to San Diego, returning Tue, Oct 14, priced at $157 just found

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

September is typically the cheapest month to fly

From $85 - $160 per traveler.

Graph displaying average flight prices per month

Flights from Boise (BOI) to San Diego (SAN)
Origin airport
Boise
Destination airport
San Diego Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Southwest Airlines, Spirit Airlines, United
Roundtrip price
$117
Distance
750 mi
Average flight time
1 hour 19 mins

Boise to San Diego Flights

The cheapest times to fly from Boise to San Diego

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 Boise to San Diego are during the month of September. You can find some of the cheapest flights from Boise to San Diego with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from Boise to San Diego: 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 Boise to San Diego

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 Boise to San Diego 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 Boise to San Diego 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 Boise to San Diego 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 Boise Airport (BOI) to San Diego Intl. Airport (SAN) cost?
Find cheap return fares from Boise Airport (BOI) to San Diego Intl. Airport (SAN) starting from $114. Grab a seat and get ready for takeoff. 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 BOI on August 1 2025 and touching down at SAN. The price was last updated on July 13 2025 and has not changed since.
What is the cheapest month to fly from BOI to SAN?
The cheapest flights from BOI to SAN 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 Boise Airport (BOI) to San Diego Intl. Airport (SAN)?
You can travel nonstop from Boise Airport (BOI) to San Diego Intl. Airport (SAN) on an Alaska Airlines flight.
What is the cheapest airline that flies from BOI to SAN?
With prices starting from $57 for a one-way journey from BOI to SAN, Southwest Airlines is currently the cheapest airline operating this route. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from BOI on October 8 2025. Prices were last updated on July 13 2025 and have not changed since.
How many flights per day from Boise Airport (BOI) to San Diego Intl. Airport (SAN)?
When taking off from Boise Airport (BOI), you can pick from an average of 2 daily nonstop flights to San Diego Intl. Airport (SAN).
What are the most popular departure times for flights from Boise Airport (BOI) to San Diego Intl. Airport (SAN)?
The 5 PM departures from BOI to SAN see the highest demand. Greater demand means you'll likely pay more for these departures. If you're hoping to save money, pick a less crowded time to fly.
What day of the week has the most flights from BOI to SAN?
If you jet off on a Friday, you'll get the largest range of choices for flights from Boise Airport (BOI) to San Diego Intl. Airport (SAN).
What is the earliest flight from Boise Airport (BOI) to San Diego Intl. Airport (SAN)?
Catch the earliest flight at around 8:10AM UTC-7, departing from Boise Airport (BOI). You'll be flying for approximately 2h 27m, arriving at San Diego Intl. Airport (SAN) at approximately 9:37AM UTC-8.
How long does it take to fly from Boise Airport (BOI) to San Diego Intl. Airport (SAN)?
It takes around 2 hours and 22 minutes to cover the 750 mi from BOI to SAN.
What airline has the least delays from BOI to SAN?
Consider traveling with Southwest Airlines if you'd like to go straight from Boise Airport (BOI) to San Diego Intl. Airport (SAN) without any interruptions. This airline has the best track record for punctuality, with an on-time score of 100%. Want to be updated if anything changes? You can keep an eye on your flight status using the Expedia App.
What is the best time to fly from Boise Airport (BOI) to San Diego Intl. Airport (SAN)?
To avoid potential delays on the Boise Airport (BOI) to San Diego Intl. Airport (SAN) route, aim to travel before 3 PM. Later flights have a 22% higher chance of cancellation.**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 San Diego from Boise Airport (BOI)?
San Diego Intl. Airport (SAN) is the only airport in San Diego with direct flights from Boise Airport (BOI). Browse the available options and find cheap fares on Expedia.
Is it cheaper to buy a plane ticket from Boise Airport (BOI) to San Diego Intl. Airport (SAN) last-minute?
Waiting until just before your trip to book a ticket from BOI to SAN often results in higher prices. Although you may find some last-minute discounts, there's no guarantee. Allow some flexibility in your schedule for the best chance of scoring a bargain.
Is it cheaper to book a BOI to SAN flight and hotel package?
Compared with arranging hotels and flights separately, booking a BOI to SAN flight and hotel package with Expedia could lead to significant savings. Better yet, having everything in one convenient place will take the stress out of planning your trip. Just pick your flights and choose from our extensive range of hotels, then personalize your trip with extras like car rentals and activities.
Can I cancel or change the date of my flight from Boise Airport (BOI) to San Diego Intl. Airport (SAN)?
Usually, it's possible to reschedule or cancel your BOI to SAN flight. However, for bookings made more than 24 hours ago, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find further details on our Customer Service portal.

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*Available to One Key members.