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$124+ Cheap flights from Billings to San Diego (BIL - 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 3/18. Fares are subject to change and may not be available on all flights or dates of travel.
BIL — SAN
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheap flight deals from Billings to San Diego

Cheapest flights from Billings to San Diego
Explore the most affordable flight options available from Billings to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.

This American Airlines deal was found by Cheapflights users on 12/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:50 amBIL - SAN
1 stop6h 14mAmerican Airlines
Wed 12/314:25 pmSAN - BIL
1 stop5h 29mAmerican Airlines
Deal found 12/10$365
This Kiwi.com deal was found by Cheapflights users on 12/11. 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 12/3112:07 pmBIL - SAN
2 stops22h 50mMultiple Airlines
Sat 1/37:21 pmSAN - BIL
1 stop24h 54mMultiple Airlines
Deal found 12/11$412
This United Airlines deal was found by Cheapflights users on 12/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2410:55 amBIL - SAN
1 stop5h 06mUnited Airlines
Wed 12/3111:12 amSAN - BIL
2 stops9h 12mUnited Airlines
Deal found 12/10$459
This United Airlines deal was found by Cheapflights users on 12/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2410:55 amBIL - SAN
1 stop5h 06mUnited Airlines
Tue 12/306:30 amSAN - BIL
1 stop5h 54mUnited Airlines
Deal found 12/10$491
This United Airlines deal was found by Cheapflights users on 12/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/236:35 amBIL - SAN
1 stop7h 24mUnited Airlines
Tue 12/306:30 amSAN - BIL
1 stop5h 54mUnited Airlines
Deal found 12/11$549
This American Airlines deal was found by Cheapflights users on 12/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:50 amBIL - SAN
1 stop6h 14mAmerican Airlines
Mon 12/294:25 pmSAN - BIL
1 stop5h 29mAmerican Airlines
Deal found 12/10$579
This United Airlines deal was found by Cheapflights users on 12/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:35 amBIL - SAN
1 stop7h 24mUnited Airlines
Mon 12/295:40 pmSAN - BIL
2 stops18h 44mUnited Airlines
Deal found 12/10$598
This American Airlines deal was found by Cheapflights users on 12/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/181:54 pmBIL - SAN
1 stop7h 21mAmerican Airlines
Sun 12/214:25 pmSAN - BIL
1 stop5h 29mAmerican Airlines
Deal found 12/11$606
This United Airlines deal was found by Cheapflights users on 12/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:50 pmBIL - SAN
1 stop27h 57mUnited Airlines
Sat 1/36:30 amSAN - BIL
1 stop5h 54mUnited Airlines
Deal found 12/11$622

Find flight deals from Billings to San Diego

Discover tips and strategies to find the most affordable flight options for your journey from Billings (BIL) to San Diego (SAN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$216
(Kiwi.com)

One-way from

$124
(Alaska Airlines)

Popular in

June

Cheapest in

January

Average price

$408
Provider with most accurate pricing for Billings Logan Intl-San Diego flight deals.
Search Deals
Provider most trusted by Cheapflights users for Billings Logan Intl-San Diego flights.
Search Deals
From Billings Logan Intl to San Diego
Search Deals
One-way flight from Billings Logan Intl to San Diego
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($26 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Billings 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 December 12, 2025.
Use the filters below to find and compare flights from Billings to San Diego that are best for you.

Fly from

Billings

Fly to

San Diego

Route

Depart

Return

Price

BillingsSan Diego

BIL - SAN

BILSAN

Billings Logan Intl

Tue 1/27

5:15 am-8:50 am

1 stop4h 35m

San Diego

Tue 3/3

10:59 am-10:26 pm

2 stops10h 27m

$254

BillingsSan Diego

BIL - SAN

BILSAN

Billings Logan Intl

Fri 1/9

7:00 am-11:09 pm

1 stop17h 09m

San Diego

Tue 1/13

2:20 pm-2:55 pm

1 stop23h 35m

$254

BillingsSan Diego

BIL - SAN

BILSAN

Billings Logan Intl

Wed 1/28

2:15 pm-8:41 pm

1 stop7h 26m

San Diego

Sun 2/1

4:00 pm-11:42 pm

1 stop6h 42m

$254

BillingsSan Diego

BIL - SAN

BILSAN

Billings Logan Intl

Mon 1/5

6:00 am-9:25 am

1 stop28h 25m

San Diego

Sat 1/10

6:15 am-2:55 pm

1 stop7h 40m

$254

BillingsSan Diego

BIL - SAN

BILSAN

Billings Logan Intl

Fri 1/9

4:13 pm-8:42 pm

1 stop5h 29m

San Diego

Sun 1/11

11:08 am-9:23 pm

2 stops9h 15m

$264

BillingsSan Diego

BIL - SAN

BILSAN

Billings Logan Intl

Wed 2/18

7:00 am-1:20 pm

1 stop7h 20m

San Diego

Mon 2/23

7:00 am-1:24 pm

1 stop5h 24m

$268

BillingsSan Diego

BIL - SAN

BILSAN

Billings Logan Intl

Mon 1/5

2:40 pm-8:47 pm

1 stop7h 07m

San Diego

Sun 1/11

6:30 am-1:24 pm

1 stop5h 54m

$285

BillingsSan Diego

BIL - SAN

BILSAN

Billings Logan Intl

Wed 3/18

1:25 pm-6:47 pm

1 stop6h 22m

$124

BillingsSan Diego

BIL - SAN

BILSAN

Billings Logan Intl

Fri 5/29

7:24 pm-11:59 pm

1 stop5h 35m

$158

BillingsSan Diego

BIL - SAN

BILSAN

Billings Logan Intl

Sat 3/21

6:35 pm-9:55 pm

1 stop4h 20m

$159

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 15 results
1
2

Compare providers for flights from Billings to San Diego

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Billings to San Diego in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Billings-San Diego flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Billings-San Diego flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Billings-San Diego flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Billings-San Diego flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Billings-San Diego flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Billings to San Diego

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

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

Currently, October is the cheapest month in which you can book a flight from Billings to San Diego (average of $142). Flying from Billings to San Diego in May is currently the most expensive (average of $276). 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 BIL to SAN?

Find hourly flight availability from Billings 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 December 12, 2025.

It’s optimal to fly from Billings to San Diego at noon. By choosing this option you can save up to 29% on the cost of your flight, compared to a flight in the evening.

Reviews of airlines servicing San Diego

Get insights into the airlines that provide service to San Diego. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Diego. Reviews last updated December 12, 2025.
See what other customers who have flown with Alaska Airlines, Delta, and United Airlines from Billings to San Diego have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,432 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Entertainment

7.0

Overall

8.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Alaska Airlines
8.0
Very good
11,432 reviews
Alaska Airlines
8.0
Very good
11,432 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Entertainment

7.0

Overall

8.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Delta
7.9
Good
8,007 reviews
Alaska Airlines
8.0
Very good
11,432 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Entertainment

7.0

Overall

8.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
United Airlines
7.4
Good
9,095 reviews
Alaska Airlines
8.0
Very good
11,432 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Entertainment

7.0

Overall

8.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
American Airlines
7.2
Good
11,050 reviews
Alaska Airlines
8.0
Very good
11,432 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Entertainment

7.0

Overall

8.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.

Related info for your journey

Find useful and relevant information for your journey from Billings to San Diego. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    For as low as $254, Delta can have you in San Diego from Billings in 4h 35m. Billings and San Diego are separated by a distance of 1013 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Billings to San Diego round-trip?

    Cheapflights users have booked flights from Billings to San Diego round-trip from $220. Other airlines that can offer you cheap pricing are Delta, from $244, and Alaska Airlines, from $253. These flights start at 42% lower than the current average price 3 months from now.

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

    To fly one-way, consider booking your trip with Alaska Airlines, which is currently one of the cheapest options available, starting at $138. Delta flights start at $142 while deals on United Airlines start at $158 one-way.

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

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

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

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

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

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

    Currently, October is the cheapest month in which you can book a flight from Billings to San Diego (average of $142). Flying from Billings to San Diego in May is currently the most expensive (average of $276). 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
Lemon Grove
Julian
National City

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Top 4 airlines flying from Billings to San Diego

Discover the top 4 airlines that operate flights from Billings 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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$220Average$379FlexibilityNo cancel feeOn-time71%
DeltaCheapest$244Average$359FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$253Average$370FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$310Average$419FlexibilityNo cancel feeOn-time69%

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