$169+ 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 5/29. Fares are subject to change and may not be available on all flights or dates of travel.
BIL — SAN
Apr 12 — Apr 191
Round-trip
1 adult, Economy
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Find cheap flights from Billings to San Diego with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Billings to San Diego
Cheapest
Best
Last-minute
One-way
Cheapest flights from Billings to San DiegoExplore 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 March 13, 2026.
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 March 13, 2026.
This Delta deal was found by Cheapflights users on 3/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/256:18 pm
BIL
- SAN
1 stop4h 23m
Delta
Tue 4/285:00 pm
SAN
- BIL
1 stop4h 54m
Delta
Deal found 3/11![Delta logo]()
$251
This United Airlines deal was found by Cheapflights users on 3/12. 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 4/152:35 pm
BIL
- SAN
1 stop7h 47m
United Airlines
Tue 4/2111:01 am
SAN
- BIL
2 stops8h 56m
United Airlines
Deal found 3/12![United Airlines logo]()
$276
This United Airlines deal was found by Cheapflights users on 3/8. 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.
Sat 4/252:35 pm
BIL
- SAN
2 stops9h 03m
United Airlines
Tue 4/2811:01 am
SAN
- BIL
2 stops8h 56m
United Airlines
Deal found 3/8![United Airlines logo]()
$283
This Alaska Airlines deal was found by Cheapflights users on 3/8. 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 4/187:56 am
BIL
- SAN
1 stop12h 51m
Alaska Airlines
Tue 4/216:15 am
SAN
- BIL
1 stop16h 43m
Alaska Airlines
Deal found 3/8![Alaska Airlines logo]()
$284
This Expedia deal was found by Cheapflights users on 3/12. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/1512:34 pm
BIL
- SAN
1 stop5h 31m
Alaska Airlines
Tue 4/216:15 am
SAN
- BIL
1 stop16h 43m
Alaska Airlines
Deal found 3/12![Alaska Airlines logo]()
$291
This United Airlines deal was found by Cheapflights users on 3/8. 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 4/2110:38 am
BIL
- SAN
2 stops9h 00m
United Airlines
Sat 4/2511:01 am
SAN
- BIL
2 stops8h 56m
United Airlines
Deal found 3/8![United Airlines logo]()
$292
Best flights from Billings to San DiegoDiscover carefully curated flight deals from Billings to San Diego that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 13, 2026.
Discover carefully curated flight deals from Billings to San Diego that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 13, 2026.
This Delta deal was found by Cheapflights users on 3/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/256:18 pm
BIL
- SAN
1 stop4h 23m
Delta
Tue 4/285:00 pm
SAN
- BIL
1 stop4h 54m
Delta
Deal found 3/11![Delta logo]()
$251
This Alaska Airlines deal was found by Cheapflights users on 3/8. 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 4/187:56 am
BIL
- SAN
1 stop12h 51m
Alaska Airlines
Tue 4/216:15 am
SAN
- BIL
1 stop16h 43m
Alaska Airlines
Deal found 3/8![Alaska Airlines logo]()
$284
This United Airlines deal was found by Cheapflights users on 3/8. 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.
Fri 8/145:57 pm
BIL
- SAN
1 stop5h 30m
United Airlines
Mon 8/176:30 am
SAN
- BIL
1 stop5h 50m
United Airlines
Deal found 3/8![United Airlines logo]()
$331
This United Airlines deal was found by Cheapflights users on 3/11. 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.
Fri 4/175:51 pm
BIL
- SAN
1 stop5h 39m
United Airlines
Mon 4/206:32 am
SAN
- BIL
1 stop5h 51m
United Airlines
Deal found 3/11![United Airlines logo]()
$332
This United Airlines deal was found by Cheapflights users on 3/12. 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 4/292:35 pm
BIL
- SAN
2 stops10h 54m
United Airlines
Sun 5/36:32 am
SAN
- BIL
1 stop5h 51m
United Airlines
Deal found 3/12![United Airlines logo]()
$336
Last-minute flights from Billings to San DiegoDiscover last-minute flight deals from Billings to San Diego. Data last updated March 13, 2026 and is based on user searches.
Discover last-minute flight deals from Billings to San Diego. Data last updated March 13, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 3/12. 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 4/152:35 pm
BIL
- SAN
1 stop7h 47m
United Airlines
Tue 4/2111:01 am
SAN
- BIL
2 stops8h 56m
United Airlines
Deal found 3/12![United Airlines logo]()
$276
This Expedia deal was found by Cheapflights users on 3/12. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/1512:34 pm
BIL
- SAN
1 stop5h 31m
Alaska Airlines
Tue 4/216:15 am
SAN
- BIL
1 stop16h 43m
Alaska Airlines
Deal found 3/12![Alaska Airlines logo]()
$291
This Alaska Airlines deal was found by Cheapflights users on 3/8. 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 4/187:56 am
BIL
- SAN
1 stop12h 51m
Alaska Airlines
Tue 4/216:15 am
SAN
- BIL
1 stop16h 43m
Alaska Airlines
Deal found 3/8![Alaska Airlines logo]()
$284
This United Airlines deal was found by Cheapflights users on 3/8. 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 4/2110:38 am
BIL
- SAN
2 stops9h 00m
United Airlines
Sat 4/2511:01 am
SAN
- BIL
2 stops8h 56m
United Airlines
Deal found 3/8![United Airlines logo]()
$292
This Delta deal was found by Cheapflights users on 3/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/256:18 pm
BIL
- SAN
1 stop4h 23m
Delta
Tue 4/285:00 pm
SAN
- BIL
1 stop4h 54m
Delta
Deal found 3/11![Delta logo]()
$251
This United Airlines deal was found by Cheapflights users on 3/8. 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.
Sat 4/252:35 pm
BIL
- SAN
2 stops9h 03m
United Airlines
Tue 4/2811:01 am
SAN
- BIL
2 stops8h 56m
United Airlines
Deal found 3/8![United Airlines logo]()
$283
One-way flights from Billings to San DiegoSearch for one-way flight options from Billings to San Diego. Find affordable one-way fares based on user searches. Data last updated March 13, 2026.
Search for one-way flight options from Billings to San Diego. Find affordable one-way fares based on user searches. Data last updated March 13, 2026.
This Delta deal was found by Cheapflights users on 3/9. 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.
Fri 5/295:35 am
BIL
- SAN
1 stop4h 10m
Delta
Deal found 3/9![Delta logo]()
$169
This Delta deal was found by Cheapflights users on 3/13. 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 5/255:35 am
BIL
- SAN
1 stop4h 10m
Delta
Deal found 3/13![Delta logo]()
$186
This United Airlines deal was found by Cheapflights users on 3/9. 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.
Fri 5/294:10 pm
BIL
- SAN
2 stops8h 44m
United Airlines
Deal found 3/9![United Airlines logo]()
$214
This Kiwi.com deal was found by Cheapflights users on 3/13. 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.
Mon 5/2510:00 am
BIL
- SAN
2 stops30h 31m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$291
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 March 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $251 (Delta) |
One-way from | $169 (American Airlines) |
Popular in | June |
Cheapest in | January |
Average price | $402 |
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 March 13, 2026.
Use the filters below to find and compare flights from Billings to San Diego that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
BillingsSan Diego
BIL - SAN
BILSAN
Billings Logan Intl
Sat 4/25
6:18 pm-9:41 pm
1 stop4h 23m
San Diego
Tue 4/28
5:00 pm-10:54 pm
1 stop4h 54m
$251
BillingsSan Diego
BIL - SAN
BILSAN
Billings Logan Intl
Sat 4/18
7:56 am-7:47 pm
1 stop12h 51m
San Diego
Tue 4/21
6:15 am-11:58 pm
1 stop16h 43m
$284
BillingsSan Diego
BIL - SAN
BILSAN
Billings Logan Intl
Fri 8/14
5:57 pm-10:27 pm
1 stop5h 30m
San Diego
Mon 8/17
6:30 am-1:20 pm
1 stop5h 50m
$331
BillingsSan Diego
BIL - SAN
BILSAN
Billings Logan Intl
Fri 4/17
5:51 pm-10:30 pm
1 stop5h 39m
San Diego
Mon 4/20
6:32 am-1:23 pm
1 stop5h 51m
$332
BillingsSan Diego
BIL - SAN
BILSAN
Billings Logan Intl
Wed 4/29
2:35 pm-12:29 am
2 stops10h 54m
San Diego
Sun 5/3
6:32 am-1:23 pm
1 stop5h 51m
$336
Cheapest one-way
BillingsSan Diego
BIL - SAN
BILSAN
Billings Logan Intl
Fri 5/29
12:42 pm-9:29 pm
1 stop9h 47m
$169
BillingsSan Diego
BIL - SAN
BILSAN
Billings Logan Intl
Fri 5/29
6:27 am-12:57 pm
1 stop7h 30m
$169
Quickest one-way
BillingsSan Diego
BIL - SAN
BILSAN
Billings Logan Intl
Mon 5/25
5:35 am-8:45 am
1 stop4h 10m
$186
BillingsSan Diego
BIL - SAN
BILSAN
Billings Logan Intl
Fri 5/29
4:10 pm-11:54 pm
2 stops8h 44m
$214
Sorted by cheapest first
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 March.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Billings-San Diego flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Billings-San Diego flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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.
BIL-SAN
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
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 March 13, 2026.
See what other customers who have flown with Alaska Airlines,Delta, andUnited 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.
Overall
8.0
Boarding
8.1
Entertainment
7.0
Comfort
7.8
Food
7.1
Crew
8.5
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
Overall
8.0
Boarding
8.1
Entertainment
7.0
Comfort
7.8
Food
7.1
Crew
8.5
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
Overall
8.0
Boarding
8.1
Entertainment
7.0
Comfort
7.8
Food
7.1
Crew
8.5
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
Overall
8.0
Boarding
8.1
Entertainment
7.0
Comfort
7.8
Food
7.1
Crew
8.5
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
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.
Traveling to a place near San Diego?
Book flights to San Diego if you plan to visit one of these locationsEl Cajon
Chula Vista
National City
Coronado
La Mesa
Poway
Julian
Lemon Grove
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Billings and San Diego flights
Browse other Billings and San Diego flight options. Last updated on March 13, 2026.
Other flights from Billings
Browse through other flights departing from Billings. Flights are based on user searches made on Cheapflights and were last updated on March 13, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to San Diego
Explore flights to San Diego departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on March 13, 2026.
Top 3 airlines flying from Billings to San Diego
Discover the top 3 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 March 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$236 | Average$348 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$254 | Average$364 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$293 | Average$417 | FlexibilityNo cancel fee | On-time69% |