$125+ 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 5/15. Fares are subject to change and may not be available on all flights or dates of travel.
BIL — SAN
May 23 — May 301
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
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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 April 23, 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 April 23, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/21. 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.
Tue 5/262:41 pm
BIL
- SAN
1 stop25h 50m
Multiple Airlines
Thu 5/2810:07 pm
SAN
- BIL
1 stop10h 03m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$251
This Kiwi.com deal was found by Cheapflights users on 4/21. 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.
Tue 5/262:41 pm
BIL
- SAN
1 stop25h 50m
Multiple Airlines
Mon 6/11:38 pm
SAN
- BIL
1 stop23h 13m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$261
This Kiwi.com deal was found by Cheapflights users on 4/21. 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.
Tue 5/262:41 pm
BIL
- SAN
1 stop25h 50m
Multiple Airlines
Sat 5/304:17 pm
SAN
- BIL
1 stop23h 55m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$277
This Kiwi.com deal was found by Cheapflights users on 4/21. 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.
Sun 5/246:02 pm
BIL
- SAN
1 stop19h 41m
Multiple Airlines
Fri 5/291:38 pm
SAN
- BIL
1 stop24h 13m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$281
This Kiwi.com deal was found by Cheapflights users on 4/21. 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.
Fri 5/153:41 pm
BIL
- SAN
1 stop27h 18m
Multiple Airlines
Wed 5/204:17 pm
SAN
- BIL
1 stop23h 55m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$295
This Kiwi.com deal was found by Cheapflights users on 4/18. 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 5/410:34 am
BIL
- SAN
1 stop8h 22m
Multiple Airlines
Sat 5/234:17 pm
SAN
- BIL
1 stop23h 55m
Multiple Airlines
Deal found 4/18![Multiple Airlines logo]()
$299
This Kiwi.com deal was found by Cheapflights users on 4/20. 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.
Thu 5/286:02 pm
BIL
- SAN
1 stop19h 41m
Multiple Airlines
Mon 6/11:38 pm
SAN
- BIL
1 stop23h 13m
Multiple Airlines
Deal found 4/20![Multiple Airlines logo]()
$302
This Kiwi.com deal was found by Cheapflights users on 4/21. 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.
Sun 5/246:02 pm
BIL
- SAN
1 stop19h 41m
Multiple Airlines
Thu 5/2810:07 pm
SAN
- BIL
1 stop10h 03m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$305
This Kiwi.com deal was found by Cheapflights users on 4/21. 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.
Sun 5/246:02 pm
BIL
- SAN
1 stop19h 41m
Multiple Airlines
Mon 6/11:38 pm
SAN
- BIL
1 stop23h 13m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$314
This Kiwi.com deal was found by Cheapflights users on 4/19. 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.
Fri 8/1410:00 am
BIL
- SAN
1 stop11h 58m
Multiple Airlines
Sun 8/169:53 pm
SAN
- BIL
1 stop10h 17m
Multiple Airlines
Deal found 4/19![Multiple Airlines logo]()
$318
This Kiwi.com deal was found by Cheapflights users on 4/19. 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.
Fri 8/284:00 pm
BIL
- SAN
1 stop5h 58m
Multiple Airlines
Sun 8/309:53 pm
SAN
- BIL
1 stop22h 14m
Multiple Airlines
Deal found 4/19![Multiple Airlines logo]()
$324
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 April 23, 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 April 23, 2026.
This United Airlines deal was found by Cheapflights users on 4/18. 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 5/165:05 am
BIL
- SAN
1 stop5h 10m
United Airlines
Sat 5/236:30 am
SAN
- BIL
1 stop5h 52m
United Airlines
Deal found 4/18![United Airlines logo]()
$329
This Alaska Airlines deal was found by Cheapflights users on 4/19. 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 5/277:21 pm
BIL
- SAN
1 stop14h 54m
Alaska Airlines
Mon 6/18:04 pm
SAN
- BIL
1 stop16h 17m
Alaska Airlines
Deal found 4/19![Alaska Airlines logo]()
$339
This Delta deal was found by Cheapflights users on 4/21. 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 5/195:30 am
BIL
- SAN
1 stop4h 15m
Delta
Fri 5/295:01 pm
SAN
- BIL
1 stop4h 51m
Delta
Deal found 4/21![Delta logo]()
$339
This United Airlines deal was found by Cheapflights users on 4/18. 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 5/75:51 pm
BIL
- SAN
1 stop5h 25m
United Airlines
Sat 5/912:40 pm
SAN
- BIL
1 stop7h 17m
United Airlines
Deal found 4/18![United Airlines logo]()
$370
This Alaska Airlines deal was found by Cheapflights users on 4/18. 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 5/166:00 am
BIL
- SAN
1 stop6h 51m
Alaska Airlines
Sat 5/233:56 pm
SAN
- BIL
1 stop6h 37m
Alaska Airlines
Deal found 4/18![Alaska Airlines logo]()
$409
This Alaska Airlines deal was found by Cheapflights users on 4/21. 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 5/303:34 pm
BIL
- SAN
1 stop9h 33m
Alaska Airlines
Tue 6/210:11 am
SAN
- BIL
1 stop7h 30m
Alaska Airlines
Deal found 4/21![Alaska Airlines logo]()
$413
This Alaska Airlines deal was found by Cheapflights users on 4/19. 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.
Sun 7/127:22 pm
BIL
- SAN
1 stop14h 48m
Alaska Airlines
Fri 7/179:16 pm
SAN
- BIL
1 stop16h 47m
Alaska Airlines
Deal found 4/19![Alaska Airlines logo]()
$419
Last-minute flights from Billings to San DiegoDiscover last-minute flight deals from Billings to San Diego. Data last updated April 23, 2026 and is based on user searches.
Discover last-minute flight deals from Billings to San Diego. Data last updated April 23, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 4/18. 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 5/410:34 am
BIL
- SAN
1 stop8h 22m
Multiple Airlines
Sat 5/234:17 pm
SAN
- BIL
1 stop23h 55m
Multiple Airlines
Deal found 4/18![Multiple Airlines logo]()
$299
This Kiwi.com deal was found by Cheapflights users on 4/21. 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.
Fri 5/153:41 pm
BIL
- SAN
1 stop27h 18m
Multiple Airlines
Wed 5/204:17 pm
SAN
- BIL
1 stop23h 55m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$295
This United Airlines deal was found by Cheapflights users on 4/18. 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 5/165:05 am
BIL
- SAN
1 stop5h 10m
United Airlines
Sat 5/236:30 am
SAN
- BIL
1 stop5h 52m
United Airlines
Deal found 4/18![United Airlines logo]()
$329
This Kiwi.com deal was found by Cheapflights users on 4/21. 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.
Sun 5/246:02 pm
BIL
- SAN
1 stop19h 41m
Multiple Airlines
Fri 5/291:38 pm
SAN
- BIL
1 stop24h 13m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$281
This Kiwi.com deal was found by Cheapflights users on 4/21. 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.
Sun 5/246:02 pm
BIL
- SAN
1 stop19h 41m
Multiple Airlines
Thu 5/2810:07 pm
SAN
- BIL
1 stop10h 03m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$305
This Kiwi.com deal was found by Cheapflights users on 4/21. 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.
Sun 5/246:02 pm
BIL
- SAN
1 stop19h 41m
Multiple Airlines
Mon 6/11:38 pm
SAN
- BIL
1 stop23h 13m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$314
This Kiwi.com deal was found by Cheapflights users on 4/21. 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.
Tue 5/262:41 pm
BIL
- SAN
1 stop25h 50m
Multiple Airlines
Thu 5/2810:07 pm
SAN
- BIL
1 stop10h 03m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$251
This Kiwi.com deal was found by Cheapflights users on 4/21. 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.
Tue 5/262:41 pm
BIL
- SAN
1 stop25h 50m
Multiple Airlines
Mon 6/11:38 pm
SAN
- BIL
1 stop23h 13m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$261
This Kiwi.com deal was found by Cheapflights users on 4/21. 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.
Tue 5/262:41 pm
BIL
- SAN
1 stop25h 50m
Multiple Airlines
Sat 5/304:17 pm
SAN
- BIL
1 stop23h 55m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$277
This Kiwi.com deal was found by Cheapflights users on 4/20. 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.
Thu 5/286:02 pm
BIL
- SAN
1 stop19h 41m
Multiple Airlines
Mon 6/11:38 pm
SAN
- BIL
1 stop23h 13m
Multiple Airlines
Deal found 4/20![Multiple Airlines logo]()
$302
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 April 23, 2026.
Search for one-way flight options from Billings to San Diego. Find affordable one-way fares based on user searches. Data last updated April 23, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/21. 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.
Fri 5/1510:34 am
BIL
- SAN
1 stop11h 30m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$125
This Delta deal was found by Cheapflights users on 4/17. 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 5/165:30 am
BIL
- SAN
1 stop4h 15m
Delta
Deal found 4/17![Delta logo]()
$165
This United Airlines deal was found by Cheapflights users on 4/17. 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 5/1610:35 am
BIL
- SAN
2 stops10h 27m
United Airlines
Deal found 4/17![United Airlines logo]()
$170
This Delta deal was found by Cheapflights users on 4/21. 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 5/296:19 pm
BIL
- SAN
1 stop6h 24m
Delta
Deal found 4/21![Delta logo]()
$175
This Alaska Airlines deal was found by Cheapflights users on 4/20. 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.
Fri 6/57:21 pm
BIL
- SAN
1 stop16h 01m
Alaska Airlines
Deal found 4/20![Alaska Airlines logo]()
$180
This Delta deal was found by Cheapflights users on 4/20. 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 6/56:19 pm
BIL
- SAN
1 stop6h 24m
Delta
Deal found 4/20![Delta logo]()
$210
This Alaska Airlines deal was found by Cheapflights users on 4/21. 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 6/277:22 pm
BIL
- SAN
1 stop14h 48m
Alaska Airlines
Deal found 4/21![Alaska Airlines logo]()
$215
This Delta deal was found by Cheapflights users on 4/21. 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 4/286:18 pm
BIL
- SAN
1 stop6h 24m
Delta
Deal found 4/21![Delta logo]()
$238
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 April 23, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $251 (Kiwi.com) |
One-way from | $125 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $367 |
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 April 23, 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
BillingsSan Diego
BIL - SAN
BILSAN
Billings Logan Intl
Sat 5/16
5:05 am-9:15 am
1 stop5h 10m
San Diego
Sat 5/23
6:30 am-1:22 pm
1 stop5h 52m
$329
BillingsSan Diego
BIL - SAN
BILSAN
Billings Logan Intl
Wed 5/27
7:21 pm-9:15 am
1 stop14h 54m
San Diego
Mon 6/1
8:04 pm-1:21 pm
1 stop16h 17m
$339
Quickest round-trip
BillingsSan Diego
BIL - SAN
BILSAN
Billings Logan Intl
Tue 5/19
5:30 am-8:45 am
1 stop4h 15m
San Diego
Fri 5/29
5:01 pm-10:52 pm
1 stop4h 51m
$339
BillingsSan Diego
BIL - SAN
BILSAN
Billings Logan Intl
Thu 5/7
5:51 pm-10:16 pm
1 stop5h 25m
San Diego
Sat 5/9
12:40 pm-8:57 pm
1 stop7h 17m
$370
BillingsSan Diego
BIL - SAN
BILSAN
Billings Logan Intl
Sat 5/16
6:00 am-11:51 am
1 stop6h 51m
San Diego
Sat 5/23
3:56 pm-11:33 pm
1 stop6h 37m
$409
BillingsSan Diego
BIL - SAN
BILSAN
Billings Logan Intl
Sat 5/30
3:34 pm-12:07 am
1 stop9h 33m
San Diego
Tue 6/2
10:11 am-6:41 pm
1 stop7h 30m
$413
BillingsSan Diego
BIL - SAN
BILSAN
Billings Logan Intl
Sun 7/12
7:22 pm-9:10 am
1 stop14h 48m
San Diego
Fri 7/17
9:16 pm-3:03 pm
1 stop16h 47m
$419
Cheapest one-way
BillingsSan Diego
BIL - SAN
BILSAN
Billings Logan Intl
Fri 5/15
10:34 am-9:04 pm
1 stop11h 30m
$125
Quickest one-way
BillingsSan Diego
BIL - SAN
BILSAN
Billings Logan Intl
Fri 6/5
6:19 pm-11:43 pm
1 stop6h 24m
$175
BillingsSan Diego
BIL - SAN
BILSAN
Billings Logan Intl
Fri 5/29
6:30 am-1:17 pm
1 stop7h 47m
$175
Showing 1-10 of 11 resultsSorted 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 April.
| 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
What is the cheapest month to book a flight from Billings to San Diego?
Currently, January is the cheapest month in which you can book a flight from Billings to San Diego (average of $310). Flying from Billings to San Diego in June is currently the most expensive (average of $431). 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.
How much does it cost to fly round-trip 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 April 23, 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.
Boarding
8.1
Overall
7.9
Food
7.0
Entertainment
7.0
Comfort
7.8
Crew
8.5
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
Boarding
8.1
Overall
7.9
Food
7.0
Entertainment
7.0
Comfort
7.8
Crew
8.5
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
Boarding
8.1
Overall
7.9
Food
7.0
Entertainment
7.0
Comfort
7.8
Crew
8.5
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
Boarding
8.1
Overall
7.9
Food
7.0
Entertainment
7.0
Comfort
7.8
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
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Billings and San Diego flights
Browse other Billings and San Diego flight options. Last updated on April 23, 2026.
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Browse through other flights departing from Billings. Flights are based on user searches made on Cheapflights and were last updated on April 23, 2026.
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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 April 23, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$236 | Average$343 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$254 | Average$375 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$293 | Average$408 | FlexibilityNo cancel fee | On-time69% |