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$258+ Cheap flights from Billings to San Diego (BIL - SAN)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/17. Fares are subject to change and may not be available on all flights or dates of travel.
BIL — SAN
Nov 26 — Dec 31
Wed 11/26
Wed 12/3
1 adult, Economy
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Cheapflights Tip: The best prices from Billings Logan Intl to San Diego are usually found in January or May, booked 27 days in advance, depart on a Friday or Saturday and return on a Tuesday

Cheap 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 October 27, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$258
(Hawaiian Airlines)

Popular in

June

Cheapest in

January

Average price

$381
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.
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From Billings Logan Intl to San Diego
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($22 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 October 2025
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Find 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 October 27, 2025.

This Delta deal was found by Cheapflights users on 10/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/25:14 amBIL - SAN
1 stop4h 41mDelta
Wed 12/107:07 pmSAN - BIL
1 stop4h 16mDelta
Deal found 10/24$259
This Alaska Airlines deal was found by Cheapflights users on 10/26. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/86:00 amBIL - SAN
2 stops11h 12mAlaska Airlines
Tue 12/169:34 amSAN - BIL
1 stop13h 34mAlaska Airlines
Deal found 10/26$266
This Delta deal was found by Cheapflights users on 10/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/85:14 amBIL - SAN
2 stops10h 02mDelta
Tue 12/162:12 pmSAN - BIL
1 stop8h 36mDelta
Deal found 10/25$284
This Alaska Airlines deal was found by Cheapflights users on 10/27. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/123:40 pmBIL - SAN
1 stop5h 58mAlaska Airlines
Thu 11/1311:37 amSAN - BIL
1 stop6h 02mAlaska Airlines
Deal found 10/27$371
This Delta deal was found by Cheapflights users on 10/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/125:18 amBIL - SAN
2 stops8h 28mDelta
Thu 11/134:07 pmSAN - BIL
2 stops7h 03mDelta
Deal found 10/27$401
This Alaska Airlines deal was found by Cheapflights users on 10/24. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2011:35 amBIL - SAN
2 stops10h 09mAlaska Airlines
Mon 12/298:33 pmSAN - BIL
2 stops13h 22mAlaska Airlines
Deal found 10/24$531
This United Airlines deal was found by Cheapflights users on 10/25. 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 10/2910:45 amBIL - SAN
1 stop5h 15mUnited Airlines
Sun 11/25:45 amSAN - BIL
1 stop5h 38mUnited Airlines
Deal found 10/25$561

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 October 27, 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

Sat 1/17

6:49 am-11:49 am

1 stop6h 00m

San Diego

Tue 1/20

4:00 pm-10:33 pm

1 stop5h 33m

$258

BillingsSan Diego

BIL - SAN

BILSAN

Billings Logan Intl

Tue 12/2

5:14 am-8:55 am

1 stop4h 41m

San Diego

Wed 12/10

7:07 pm-12:23 am

1 stop4h 16m

$259

BillingsSan Diego

BIL - SAN

BILSAN

Billings Logan Intl

Sat 1/17

5:15 am-8:49 am

1 stop4h 34m

San Diego

Tue 1/20

11:00 am-10:33 pm

2 stops10h 33m

$264

BillingsSan Diego

BIL - SAN

BILSAN

Billings Logan Intl

Mon 12/8

6:00 am-4:12 pm

2 stops11h 12m

San Diego

Tue 12/16

9:34 am-12:08 am

1 stop13h 34m

$266

BillingsSan Diego

BIL - SAN

BILSAN

Billings Logan Intl

Wed 1/21

3:35 pm-8:58 pm

1 stop6h 23m

San Diego

Sun 1/25

4:01 pm-11:36 pm

1 stop6h 35m

$278

BillingsSan Diego

BIL - SAN

BILSAN

Billings Logan Intl

Wed 1/21

4:13 pm-10:37 pm

1 stop7h 24m

San Diego

Sun 1/25

6:30 am-1:24 pm

1 stop5h 54m

$279

BillingsSan Diego

BIL - SAN

BILSAN

Billings Logan Intl

Sat 11/1

3:40 pm-8:44 pm

1 stop6h 04m

$480

BillingsSan Diego

BIL - SAN

BILSAN

Billings Logan Intl

Fri 10/31

2:00 pm-8:56 pm

1 stop7h 56m

$505

BillingsSan Diego

BIL - SAN

BILSAN

Billings Logan Intl

Sat 11/1

2:31 pm-12:13 am

2 stops10h 42m

$575

BillingsSan Diego

BIL - SAN

BILSAN

Billings Logan Intl

Fri 10/31

2:31 pm-12:13 am

2 stops10h 42m

$581

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/25

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 October.
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

How far ahead should I book a flight from Billings to San Diego?

Use this chart to determine the optimal time to book a round-trip flight from Billings to San Diego. Price data was last updated on October 24, 2025.

Booking 27 days in advance of your planned departure date is, on average, the best time to get cheap flights from Billings to San Diego. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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 $155). 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 October 27, 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 October 27, 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
11,197 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.0

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
11,197 reviews
Alaska Airlines
8.0
Very good
11,197 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.0

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
7,996 reviews
Alaska Airlines
8.0
Very good
11,197 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.0

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
8,997 reviews
Alaska Airlines
8.0
Very good
11,197 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.0

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
11,033 reviews
Alaska Airlines
8.0
Very good
11,197 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.0

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 $259, American Airlines can have you in San Diego from Billings in 4h 41m. 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 $254, and Alaska Airlines, from $258. These flights start at 42% lower than the current average price 3 months from now.

  • 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 $155). 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
Imperial Beach
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 October 27, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$220Average$376FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$258Average$407FlexibilityNo cancel feeOn-time75%
DeltaCheapest$276Average$365FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$310Average$420FlexibilityNo cancel feeOn-time69%

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