$124 Cheap Flights from Billings (BIL) to San Diego (SAN)

View $124 flight on Tue, Sep 23, 2025Opens in a new window

Popular airlines from Billings Logan Intl. Airport (BIL) to San Diego Intl. Airport (SAN)

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Cheap Flights from Billings to San Diego (BIL-SAN)

Prices were available within the past 7 days and start at $124 for one-way flights and $247 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Hawaiian Airlines
Sat, Sep 27 - Tue, Sep 30
BIL
Billings
SAN
San Diego
$247 Roundtrip, found 1 day ago
$247
Roundtrip
found 1 day ago
Select Hawaiian Airlines flight, departing Sat, Sep 27 from Billings to San Diego, returning Tue, Sep 30, priced at $247 found 1 day ago
American Airlines
Wed, Aug 27 - Wed, Sep 3
BIL
Billings
CLD
Carlsbad
$248 Roundtrip, found 3 days ago
$248
Roundtrip
found 3 days ago
Select American Airlines flight, departing Wed, Aug 27 from Billings to Carlsbad, returning Wed, Sep 3, priced at $248 found 3 days ago
Hawaiian Airlines
Sat, Sep 13 - Tue, Sep 16
BIL
Billings
SAN
San Diego
$253 Roundtrip, found 1 hour ago
$253
Roundtrip
found 1 hour ago
Select Hawaiian Airlines flight, departing Sat, Sep 13 from Billings to San Diego, returning Tue, Sep 16, priced at $253 found 1 hour ago
Delta
Sat, Oct 18 - Thu, Oct 23
BIL
Billings
SAN
San Diego
$258 Roundtrip, found 16 hours ago
$258
Roundtrip
found 16 hours ago
Select Delta flight, departing Sat, Oct 18 from Billings to San Diego, returning Thu, Oct 23, priced at $258 found 16 hours ago
Alaska Airlines
Tue, Oct 21 - Sat, Oct 25
BIL
Billings
SAN
San Diego
$259 Roundtrip, just found
$259
Roundtrip
just found
Select Alaska Airlines flight, departing Tue, Oct 21 from Billings to San Diego, returning Sat, Oct 25, priced at $259 just found
Delta
Tue, Oct 21 - Sat, Oct 25
BIL
Billings
SAN
San Diego
$261 Roundtrip, just found
$261
Roundtrip
just found
Select Delta flight, departing Tue, Oct 21 from Billings to San Diego, returning Sat, Oct 25, priced at $261 just found
American Airlines
Wed, Aug 27 - Wed, Sep 3
BIL
Billings
CLD
Carlsbad
$261 Roundtrip, found 3 days ago
$261
Roundtrip
found 3 days ago
Select American Airlines flight, departing Wed, Aug 27 from Billings to Carlsbad, returning Wed, Sep 3, priced at $261 found 3 days ago
Bargain Flight
Sun, Oct 19 - Wed, Oct 22
BIL
Billings
SAN
San Diego
$263 Roundtrip, found 2 days ago
$263
Roundtrip
found 2 days ago
Select Bargain Flight flight, departing Sun, Oct 19 from Billings to San Diego, returning Wed, Oct 22, priced at $263 found 2 days ago
United
Tue, Aug 12 - Sat, Aug 16
BIL
Billings
SAN
San Diego
$265 Roundtrip, found 17 hours ago
$265
Roundtrip
found 17 hours ago
Select United flight, departing Tue, Aug 12 from Billings to San Diego, returning Sat, Aug 16, priced at $265 found 17 hours ago
Delta
Tue, Oct 21 - Sat, Oct 25
BIL
Billings
SAN
San Diego
$265 Roundtrip, just found
$265
Roundtrip
just found
Select Delta flight, departing Tue, Oct 21 from Billings to San Diego, returning Sat, Oct 25, priced at $265 just found

Find the cheapest month to fly from Billings (BIL) to San Diego (SAN)

January is typically the cheapest month to fly

From $219 - $456 per traveler.

Graph displaying average flight prices per month

Flights from Billings (BIL) to San Diego (SAN)
Origin airport
Logan Intl.
Destination airport
San Diego Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Hawaiian Airlines, United
Roundtrip price
$246
Distance
1013 mi

Billings to San Diego Flights

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

 

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

Sunday is one of the best days to book for cheap flights from Billings 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 Billings 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 Billings to San Diego in 2025. You can also book with separate airlines for your outbound and return journeys, from $124 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 Billings 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 Billings 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 Logan Intl. Airport (BIL) to San Diego Intl. Airport (SAN) cost?
Discover the latest flight deals from BIL to SAN by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from BIL to SAN?
The cheapest flights from BIL 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.
What is the cheapest airline that flies from BIL to SAN?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from BIL to SAN. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Logan Intl. Airport (BIL) to San Diego Intl. Airport (SAN)?
Nonstop flights from Logan Intl. Airport (BIL) to San Diego Intl. Airport (SAN) aren't available daily, so you'll need to take a flight with a layover. Explore your options with our filter tool. Enter your travel details and pick either "1 Stop" or "2+ Stops."
What day of the week has the most flights from BIL to SAN?
Friday is typically the busiest day for flights, while Tuesday tends to be the quietest.* Remember that flight schedules can change depending on various factors, such as the carrier and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Logan Intl. Airport (BIL) to San Diego Intl. Airport (SAN)?
To reach San Diego Intl. Airport (SAN) on time, pick a flight that leaves from Logan Intl. Airport (BIL) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**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.
Is it cheaper to buy a plane ticket from Logan Intl. Airport (BIL) to San Diego Intl. Airport (SAN) last-minute?
Last-minute fares from BIL to SAN are usually more expensive. To lock in the best rates, start searching for flights well ahead of time. That being said, if you're flexible with your travel dates, you may land a cheap fare right before your trip.
Is it cheaper to book a BIL to SAN flight and hotel package?
You'll typically save money by booking a BIL to SAN flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one convenient place. Once you've chosen your ideal flights and accommodations, consider other add-ons like tours, car rentals and activities.
Can I cancel or change the date of my flight from Logan Intl. Airport (BIL) to San Diego Intl. Airport (SAN)?
In most instances, you can modify or cancel your BIL to SAN flight. However, additional charges may apply, especially if you made your booking over 24 hours ago. Double-check your itinerary for the airline's policies and fees on flight changes, or if you want more information, visit our Customer Service portal.

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*Available to One Key members.