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$142+ Cheap flights from Great Falls to San Diego (GTF - 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 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
GTF — SAN
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheap flight deals from Great Falls to San Diego

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

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 12/256:15 amGTF - SAN
1 stop7h 44mUnited Airlines
Mon 12/294:00 pmSAN - GTF
2 stops29h 46mUnited Airlines
Deal found 12/10$709
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.
Mon 12/296:15 amGTF - SAN
1 stop7h 44mUnited Airlines
Wed 12/314:10 pmSAN - GTF
1 stop5h 36mUnited Airlines
Deal found 12/11$717
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 12/242:35 pmGTF - SAN
1 stop23h 24mUnited Airlines
Tue 12/304:10 pmSAN - GTF
1 stop5h 36mUnited Airlines
Deal found 12/11$739
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/286:18 pmGTF - SAN
1 stop6h 41mDelta
Wed 12/315:03 pmSAN - GTF
1 stop4h 27mDelta
Deal found 12/11$764
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.
Sat 12/276:15 amGTF - SAN
1 stop15h 32mUnited Airlines
Fri 1/26:30 amSAN - GTF
1 stop6h 09mUnited Airlines
Deal found 12/11$767
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/287:21 pmGTF - SAN
2 stops14h 24mAlaska Airlines
Wed 12/311:28 pmSAN - GTF
2 stops28h 13mAlaska Airlines
Deal found 12/11$772
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.
Fri 12/126:15 amGTF - SAN
1 stop7h 49mUnited Airlines
Fri 1/26:30 amSAN - GTF
1 stop6h 09mUnited Airlines
Deal found 12/10$795

Find flight deals from Great Falls to San Diego

Discover tips and strategies to find the most affordable flight options for your journey from Great Falls (GTF) 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

$203
(Kiwi.com)

One-way from

$142
(Kiwi.com)

Popular in

July

Cheapest in

January

Average price

$313
Provider with most accurate pricing for Great Falls-San Diego flight deals.
Search Deals
Provider most trusted by Cheapflights users for Great Falls-San Diego flights.
Search Deals
From Great Falls to San Diego
Search Deals
One-way flight from Great Falls to San Diego
Search Deals
Highest demand for flights based on searches. 24% potential increase in price ($134 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($27 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 Great Falls 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 Great Falls to San Diego that are best for you.

Fly from

Great Falls

Fly to

San Diego

Route

Depart

Return

Price

Great FallsSan Diego

GTF - SAN

GTFSAN

Great Falls

Mon 1/5

10:25 pm-9:58 pm

1 stop24h 33m

San Diego

Sun 1/11

2:50 pm-4:28 pm

1 stop24h 38m

$203

Great FallsSan Diego

GTF - SAN

GTFSAN

Great Falls

Tue 1/6

7:21 pm-1:19 pm

1 stop18h 58m

San Diego

Tue 1/13

9:37 am-5:19 pm

1 stop6h 42m

$234

Great FallsSan Diego

GTF - SAN

GTFSAN

Great Falls

Tue 1/6

7:21 pm-1:19 pm

1 stop18h 58m

San Diego

Sat 1/10

6:15 am-5:19 pm

1 stop10h 04m

$234

Great FallsSan Diego

GTF - SAN

GTFSAN

Great Falls

Tue 1/6

7:21 pm-1:19 pm

1 stop18h 58m

San Diego

Fri 1/9

11:49 am-5:19 pm

1 stop28h 30m

$234

Great FallsSan Diego

GTF - SAN

GTFSAN

Great Falls

Thu 1/29

5:59 pm-8:58 pm

1 stop27h 59m

San Diego

Tue 2/3

9:37 am-5:19 pm

1 stop6h 42m

$244

Great FallsSan Diego

GTF - SAN

GTFSAN

Great Falls

Thu 1/29

1:12 pm-10:42 pm

2 stops10h 30m

San Diego

Tue 2/3

11:00 am-10:30 pm

2 stops10h 30m

$245

Great FallsSan Diego

GTF - SAN

GTFSAN

Great Falls

Sun 2/8

5:59 pm-5:20 pm

1 stop24h 21m

San Diego

Thu 2/19

8:26 pm-4:17 pm

1 stop18h 51m

$254

Great FallsSan Diego

GTF - SAN

GTFSAN

Great Falls

Tue 1/6

6:10 pm-10:02 am

2 stops16h 52m

San Diego

Tue 1/13

6:15 am-12:33 pm

1 stop5h 18m

$257

Great FallsSan Diego

GTF - SAN

GTFSAN

Great Falls

Tue 1/6

6:10 pm-10:02 am

2 stops16h 52m

San Diego

Sat 1/10

6:15 am-12:33 pm

1 stop5h 18m

$257

Great FallsSan Diego

GTF - SAN

GTFSAN

Great Falls

Tue 1/6

7:21 pm-8:58 pm

1 stop26h 37m

San Diego

Mon 1/12

2:20 pm-5:19 pm

1 stop25h 59m

$264

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 17 results
1
2

Compare providers for flights from Great Falls 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 Great Falls 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

*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 Great Falls-San Diego flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Great Falls-San Diego flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Great Falls-San Diego flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Great Falls-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 Great Falls-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 Great Falls to San Diego

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

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

Currently, November is the cheapest month in which you can book a flight from Great Falls to San Diego (average of $168). Flying from Great Falls to San Diego in September is currently the most expensive (average of $419). 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.

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.
Read reviews from past customers who have flown Delta from Great Falls to San Diego. 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.
Delta
7.9
Good
8,008 reviews

Food

7.3

Comfort

7.9

Crew

8.5

Entertainment

7.9

Boarding

8.1

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
7.9
Good
8,008 reviews
Delta
7.9
Good
8,008 reviews

Food

7.3

Comfort

7.9

Crew

8.5

Entertainment

7.9

Boarding

8.1

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from Great Falls 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 Great Falls to San Diego?

    There are many flights that can get you from Great Falls to San Diego in 18h 58m. Fly via Alaska Airlines to get the fastest option. Great Falls and San Diego are separated by a distance of 1063 mi.

  • What is the cheapest airline to fly from Great Falls to San Diego round-trip?

    According to our current data, Delta ($194), offers the cheapest pricing from Great Falls to San Diego. Users have found that Delta is 52% cheaper than the other options available to this destination.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Great Falls 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 Great Falls to San Diego?

    Currently, November is the cheapest month in which you can book a flight from Great Falls to San Diego (average of $168). Flying from Great Falls to San Diego in September is currently the most expensive (average of $419). 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 airline flying from Great Falls to San Diego

Discover the top airline that operate flights from Great Falls 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
DeltaCheapest$224Average$399FlexibilityNo cancel feeOn-timeN/A

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