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$338+ Cheap flights from Great Falls to San Diego (GTF - 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 3/9. Fares are subject to change and may not be available on all flights or dates of travel.
GTF — SAN
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap 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 September 11, 2025.

Round-trip from

$338
(Delta)

Popular in

September

Cheapest in

January

Average price

$631
From Great Falls to San Diego
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($21 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
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Find 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 September 11, 2025.

This Delta deal was found by Cheapflights users on 9/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/76:09 pmGTF - SAN
1 stop6h 49mDelta
Tue 11/114:58 pmSAN - GTF
1 stop4h 46mDelta
Deal found 9/10$345
This Delta deal was found by Cheapflights users on 9/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/205:30 amGTF - SAN
1 stop4h 10mDelta
Fri 10/2411:24 amSAN - GTF
2 stops10h 42mDelta
Deal found 9/10$361
This Delta deal was found by Cheapflights users on 9/11. 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 12/136:10 pmGTF - SAN
1 stop5h 43mDelta
Mon 1/510:10 amSAN - GTF
1 stop6h 34mDelta
Deal found 9/11$375
This Alaska Airlines deal was found by Cheapflights users on 9/10. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/206:15 pmGTF - SAN
1 stop17h 37mAlaska Airlines
Fri 10/246:25 pmSAN - GTF
1 stop22h 10mAlaska Airlines
Deal found 9/10$382
This Delta deal was found by Cheapflights users on 9/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/76:09 pmGTF - SAN
1 stop6h 49mDelta
Mon 11/105:10 pmSAN - GTF
1 stop4h 34mDelta
Deal found 9/10$388
This Delta deal was found by Cheapflights users on 9/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/126:10 pmGTF - SAN
1 stop6h 53mDelta
Fri 1/26:15 amSAN - GTF
1 stop5h 16mDelta
Deal found 9/10$393
This United Airlines deal was found by Cheapflights users on 9/10. 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 11/282:30 pmGTF - SAN
1 stop7h 24mUnited Airlines
Sun 11/304:10 pmSAN - GTF
1 stop5h 29mUnited Airlines
Deal found 9/10$410

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 September 11, 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 3/9

6:15 pm-11:51 pm

1 stop6h 36m

San Diego

Wed 3/11

10:10 am-5:44 pm

1 stop6h 34m

$338

Great FallsSan Diego

GTF - SAN

GTFSAN

Great Falls

Fri 11/7

6:09 pm-11:58 pm

1 stop6h 49m

San Diego

Tue 11/11

6:15 am-5:30 pm

2 stops10h 15m

$351

Great FallsSan Diego

GTF - SAN

GTFSAN

Great Falls

Mon 10/20

5:30 am-8:40 am

1 stop4h 10m

San Diego

Fri 10/24

5:25 pm-11:06 pm

1 stop4h 41m

$363

Great FallsSan Diego

GTF - SAN

GTFSAN

Great Falls

Sat 12/13

6:10 pm-10:53 pm

1 stop5h 43m

San Diego

Mon 1/5

10:10 am-5:44 pm

1 stop6h 34m

$375

Great FallsSan Diego

GTF - SAN

GTFSAN

Great Falls

Mon 10/20

6:15 pm-10:52 am

1 stop17h 37m

San Diego

Fri 10/24

6:25 pm-5:35 pm

1 stop22h 10m

$382

Great FallsSan Diego

GTF - SAN

GTFSAN

Great Falls

Fri 11/7

6:09 pm-11:58 pm

1 stop6h 49m

San Diego

Mon 11/10

5:10 pm-10:44 pm

1 stop4h 34m

$388

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

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, August is the cheapest month in which you can book a flight from Great Falls to San Diego (average of $286). Flying from Great Falls to San Diego in March is currently the most expensive (average of $366). 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 September 11, 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
8.0
Very good
7,960 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

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
8.0
Very good
7,960 reviews
Delta
8.0
Very good
7,960 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

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 6h 36m. Fly via Delta 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 ($244), offers the cheapest pricing from Great Falls to San Diego. Users have found that Delta is 43% 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, August is the cheapest month in which you can book a flight from Great Falls to San Diego (average of $286). Flying from Great Falls to San Diego in March is currently the most expensive (average of $366). 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
La Mesa
Poway
Lemon Grove
Coronado
Imperial Beach
National City
Alpine

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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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$244Average$424FlexibilityNo cancel feeOn-timeN/A

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