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$348+ Cheap flights from San Diego to Duluth (SAN - DLH)

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 8/19. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — DLH
Aug 24 — Aug 311
Mon 8/24
Mon 8/31
1 adult, Economy
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Cheap flight deals from San Diego to Duluth

Cheapest flights from San Diego to Duluth
Explore the most affordable flight options available from San Diego to Duluth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 25, 2026.

This United Airlines deal was found by Cheapflights users on 7/23. 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 8/192:15 pm
SAN
-
DLH
1 stop7h 07m
United Airlines
Wed 8/267:45 am
DLH
-
SAN
1 stop9h 17m
United Airlines
Deal found 7/23$348
This Delta deal was found by Cheapflights users on 7/23. 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.
Wed 9/211:48 am
SAN
-
DLH
1 stop5h 56m
Delta
Sun 9/64:11 pm
DLH
-
SAN
1 stop6h 05m
Delta
Deal found 7/23$384
This Delta deal was found by Cheapflights users on 7/24. 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 8/2110:25 pm
SAN
-
DLH
2 stops10h 36m
Delta
Tue 8/258:18 am
DLH
-
SAN
1 stop6h 58m
Delta
Deal found 7/24$400
This Delta deal was found by Cheapflights users on 7/22. 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 8/316:29 am
SAN
-
DLH
1 stop7h 02m
Delta
Fri 9/44:11 pm
DLH
-
SAN
1 stop20h 27m
Delta
Deal found 7/22$490
This Delta deal was found by Cheapflights users on 7/24. 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 8/143:30 pm
SAN
-
DLH
1 stop5h 11m
Delta
Mon 8/178:18 am
DLH
-
SAN
1 stop6h 58m
Delta
Deal found 7/24$496
This United Airlines deal was found by Cheapflights users on 7/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/312:08 pm
SAN
-
DLH
1 stop6h 56m
United Airlines
Wed 11/411:26 am
DLH
-
SAN
2 stops10h 37m
United Airlines
Deal found 7/20$501

Find flight deals from San Diego to Duluth

Discover tips and strategies to find the most affordable flight options for your journey from San Diego (SAN) to Duluth (DLH). 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 July 25, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$348
(United Airlines)

Popular in

March

Cheapest in

November

Average price

$971
Provider with most accurate pricing for San Diego-Duluth Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for San Diego-Duluth Intl flights.
Search Deals
From San Diego to Duluth Intl
Search Deals
Highest demand for flights based on searches. 66% potential increase in price ($1,253 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 28% potential price decrease ($139 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from San Diego to Duluth 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 July 25, 2026.
Use the filters below to find and compare flights from San Diego to Duluth that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

San DiegoDuluth

SAN - DLH

SANDLH

San Diego

Wed 8/19

2:15 pm-11:22 pm

1 stop7h 07m

Duluth Intl

Wed 8/26

7:45 am-3:02 pm

1 stop9h 17m

$348

San DiegoDuluth

SAN - DLH

SANDLH

San Diego

Tue 9/22

10:30 pm-11:03 am

2 stops10h 33m

Duluth Intl

Mon 9/28

11:43 am-10:33 pm

2 stops12h 50m

$395

San DiegoDuluth

SAN - DLH

SANDLH

San Diego

Wed 9/2

6:29 am-7:44 pm

2 stops11h 15m

Duluth Intl

Sun 9/6

4:11 pm-10:56 pm

2 stops8h 45m

$395

San DiegoDuluth

SAN - DLH

SANDLH

San Diego

Fri 8/21

10:25 pm-11:01 am

2 stops10h 36m

Duluth Intl

Tue 8/25

8:18 am-1:16 pm

1 stop6h 58m

$400

San DiegoDuluth

SAN - DLH

SANDLH

San Diego

Mon 8/31

6:29 am-3:31 pm

1 stop7h 02m

Duluth Intl

Fri 9/4

4:11 pm-10:38 am

1 stop20h 27m

$490

San DiegoDuluth

SAN - DLH

SANDLH

San Diego

Sat 10/31

2:08 pm-11:04 pm

1 stop6h 56m

Duluth Intl

Wed 11/4

11:26 am-8:03 pm

2 stops10h 37m

$501

San DiegoDuluth

SAN - DLH

SANDLH

San Diego

Sat 8/29

6:18 am-5:34 pm

1 stop9h 16m

Duluth Intl

Tue 9/1

3:11 pm-10:10 pm

1 stop8h 59m

$511
Cheapest one-way

San DiegoDuluth

SAN - DLH

SANDLH

San Diego

Sat 10/10

6:40 am-6:19 pm

1 stop9h 39m

$373

San DiegoDuluth

SAN - DLH

SANDLH

San Diego

Sat 8/8

2:00 pm-11:23 pm

1 stop7h 23m

$448

San DiegoDuluth

SAN - DLH

SANDLH

San Diego

Tue 8/11

6:40 am-5:34 pm

1 stop8h 54m

$453

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/23

Showing 1-10 of 15 resultsSorted by cheapest first
1
2

Compare providers for flights from San Diego to Duluth

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

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

How much does it cost to fly round-trip from San Diego to Duluth?

Airfare is below average for this route at the moment.

San Diego to Duluth flights typically cost between $522 and $950 in August.
The cheapest round-trip price found within the last 5 days was $348 on United Airlines (Aug 19-Aug 26).

Reviews of airlines servicing Duluth

Get insights into the airlines that provide service to Duluth. 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 Duluth. Reviews last updated July 25, 2026.
See what other customers who have flown with Delta and United Airlines from San Diego to Duluth have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.8
Good
8,486 reviews

Comfort

7.8

Boarding

8.1

Food

7.2

Entertainment

7.8

Crew

8.5

Overall

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Aug 2023

BDL - MSP

The seats were wayyyy too small! If you are a larger person buying 2 seats would not work as arm rests do not go up
Delta
7.8
Good
8,486 reviews
Delta
7.8
Good
8,486 reviews

Comfort

7.8

Boarding

8.1

Food

7.2

Entertainment

7.8

Crew

8.5

Overall

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Aug 2023

BDL - MSP

The seats were wayyyy too small! If you are a larger person buying 2 seats would not work as arm rests do not go up
United Airlines
7.4
Good
10,034 reviews
Delta
7.8
Good
8,486 reviews

Comfort

7.8

Boarding

8.1

Food

7.2

Entertainment

7.8

Crew

8.5

Overall

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Aug 2023

BDL - MSP

The seats were wayyyy too small! If you are a larger person buying 2 seats would not work as arm rests do not go up

Related info for your journey

Find useful and relevant information for your journey from San Diego to Duluth. 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 San Diego to Duluth?

    There are many flights that can get you from San Diego to Duluth in 7h 07m. Fly via United Airlines or Delta to get the fastest option. The distance between San Diego and Duluth is about 1634 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from San Diego to Duluth round-trip?

    Flying on United Airlines is currently your cheapest option to Duluth, with prices starting at $308. Another option worth looking into is Delta, starting at $333 round trip. United Airlines is priced at 50% lower than the current average price of a flight leaving 3 months from now.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from San Diego to Duluth by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near Duluth?

Book flights to Duluth if you plan to visit one of these locations
Two Harbors

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Top 2 airlines flying from San Diego to Duluth

Discover the top 2 airlines that operate flights from San Diego to Duluth. 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 July 25, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$308Average$389FlexibilityNo cancel feeOn-time69%
DeltaCheapest$333Average$477FlexibilityNo cancel feeOn-timeN/A

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