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$320+ Cheap flights from Duluth to San Diego (DLH - 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 5/30. Fares are subject to change and may not be available on all flights or dates of travel.
DLH — SAN
Jun 7 — Jun 141
Sun 6/7
Sun 6/14
1 adult, Economy
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Cheap flight deals from Duluth to San Diego

Cheapest flights from Duluth to San Diego
Explore the most affordable flight options available from Duluth to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 8, 2026.

This United Airlines deal was found by Cheapflights users on 5/4. 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 5/196:04 am
DLH
-
SAN
1 stop7h 21m
United Airlines
Sat 5/232:08 pm
SAN
-
DLH
1 stop7h 03m
United Airlines
Deal found 5/4$408
This United Airlines deal was found by Cheapflights users on 5/6. 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 11/45:00 am
DLH
-
SAN
1 stop7h 11m
United Airlines
Sat 11/77:00 am
SAN
-
DLH
1 stop8h 34m
United Airlines
Deal found 5/6$438
This United Airlines deal was found by Cheapflights users on 5/7. 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 9/295:00 am
DLH
-
SAN
1 stop8h 22m
United Airlines
Sat 10/39:45 pm
SAN
-
DLH
2 stops10h 59m
United Airlines
Deal found 5/7$454
This United Airlines deal was found by Cheapflights users on 5/8. 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.
Wed 12/235:00 am
DLH
-
SAN
1 stop7h 11m
United Airlines
Wed 12/302:09 pm
SAN
-
DLH
1 stop8h 44m
United Airlines
Deal found 5/8$535
This United Airlines deal was found by Cheapflights users on 5/7. 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 5/136:04 am
DLH
-
SAN
1 stop7h 21m
United Airlines
Sat 5/168:54 am
SAN
-
DLH
2 stops11h 10m
United Airlines
Deal found 5/7$550

Find flight deals from Duluth to San Diego

Discover tips and strategies to find the most affordable flight options for your journey from Duluth (DLH) 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 May 8, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$408
(United Airlines)

One-way from

$320
(United Airlines)

Popular in

July

Cheapest in

December

Average price

$673
Provider with most accurate pricing for Duluth Intl-San Diego flight deals.
Search Deals
Provider most trusted by Cheapflights users for Duluth Intl-San Diego flights.
Search Deals
From Duluth Intl to San Diego
Search Deals
One-way flight from Duluth Intl to San Diego
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($74 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Duluth 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 May 8, 2026.
Use the filters below to find and compare flights from Duluth to San Diego that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

DuluthSan Diego

DLH - SAN

DLHSAN

Duluth Intl

Tue 5/19

6:04 am-11:25 am

1 stop7h 21m

San Diego

Sat 5/23

2:08 pm-11:11 pm

1 stop7h 03m

$408

DuluthSan Diego

DLH - SAN

DLHSAN

Duluth Intl

Wed 11/4

5:00 am-10:11 am

1 stop7h 11m

San Diego

Sat 11/7

7:00 am-5:34 pm

1 stop8h 34m

$438

DuluthSan Diego

DLH - SAN

DLHSAN

Duluth Intl

Tue 9/29

5:00 am-5:46 pm

2 stops14h 46m

San Diego

Sat 10/3

9:45 pm-10:44 am

2 stops10h 59m

$459
Cheapest one-way

DuluthSan Diego

DLH - SAN

DLHSAN

Duluth Intl

Sat 5/30

5:15 am-10:37 am

1 stop7h 22m

$368
Quickest one-way

DuluthSan Diego

DLH - SAN

DLHSAN

Duluth Intl

Tue 6/2

4:30 pm-8:35 pm

1 stop6h 05m

$368

DuluthSan Diego

DLH - SAN

DLHSAN

Duluth Intl

Wed 6/3

4:30 pm-8:35 pm

1 stop6h 05m

$402

DuluthSan Diego

DLH - SAN

DLHSAN

Duluth Intl

Fri 5/29

5:00 am-10:25 pm

2 stops19h 25m

$408

DuluthSan Diego

DLH - SAN

DLHSAN

Duluth Intl

Mon 6/1

4:30 pm-8:45 am

2 stops18h 15m

$419

DuluthSan Diego

DLH - SAN

DLHSAN

Duluth Intl

Sun 5/31

5:15 am-11:43 pm

2 stops20h 28m

$462

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/4

Sorted by cheapest first

Compare providers for flights from Duluth 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 Duluth to San Diego in May.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice 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 Duluth-San Diego flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Duluth-San Diego flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Duluth-San Diego flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Duluth-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 Duluth-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 Duluth to San Diego

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

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

Currently, December is the cheapest month in which you can book a flight from Duluth to San Diego (average of $243). Flying from Duluth to San Diego in July is currently the most expensive (average of $712). 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 May 8, 2026.
Read through reviews of airlines operating flights from Duluth to San Diego, such as Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,456 reviews

Overall

7.9

Entertainment

7.8

Comfort

7.9

Crew

8.5

Food

7.2

Boarding

8.1

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
8,456 reviews
Delta
7.9
Good
8,456 reviews

Overall

7.9

Entertainment

7.8

Comfort

7.9

Crew

8.5

Food

7.2

Boarding

8.1

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 Duluth 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 Duluth to San Diego?

    United Airlines can get you from Duluth to San Diego in just under 7h 21m. Your travel time can differ by up to . The distance from Duluth to San Diego is about 1634 mi.

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

    Cheapflights users have booked flights from Duluth to San Diego round-trip from $288. Users have found that Delta is 41% cheaper than the other options available to this destination.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Duluth 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 Duluth to San Diego?

    Currently, December is the cheapest month in which you can book a flight from Duluth to San Diego (average of $243). Flying from Duluth to San Diego in July is currently the most expensive (average of $712). 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
National City
Coronado
La Mesa
Poway
Julian
Lemon Grove

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Top airline flying from Duluth to San Diego

Discover the top airline that operate flights from Duluth 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 May 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$288Average$458FlexibilityNo cancel feeOn-timeN/A

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