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$310+ 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 5/4. Fares are subject to change and may not be available on all flights or dates of travel.
DLH — SAN
May 9 — May 161
Sat 5/9
Sat 5/16
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 April 9, 2026.

This United Airlines deal was found by Cheapflights users on 4/6. 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.
Mon 5/42:57 pm
DLH
-
SAN
1 stop9h 42m
United Airlines
Mon 5/1110:40 pm
SAN
-
DLH
1 stop9h 54m
United Airlines
Deal found 4/6$378
This Delta deal was found by Cheapflights users on 4/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/118:05 am
DLH
-
SAN
1 stop6h 50m
Delta
Sun 9/138:50 am
SAN
-
DLH
1 stop8h 36m
Delta
Deal found 4/6$383
This United Airlines deal was found by Cheapflights users on 4/6. 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.
Fri 11/1311:26 am
DLH
-
SAN
1 stop9h 11m
United Airlines
Tue 11/172:09 pm
SAN
-
DLH
1 stop8h 44m
United Airlines
Deal found 4/6$406
This United Airlines deal was found by Cheapflights users on 4/6. 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.
Tue 4/2111:19 am
DLH
-
SAN
1 stop9h 32m
United Airlines
Sat 4/2510:52 am
SAN
-
DLH
1 stop9h 14m
United Airlines
Deal found 4/6$428
This Delta deal was found by Cheapflights users on 4/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/14:29 pm
DLH
-
SAN
1 stop6h 13m
Delta
Thu 5/73:30 pm
SAN
-
DLH
1 stop5h 14m
Delta
Deal found 4/6$433
This United Airlines deal was found by Cheapflights users on 4/5. 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 9/193:08 pm
DLH
-
SAN
1 stop9h 02m
United Airlines
Wed 9/231:53 pm
SAN
-
DLH
1 stop7h 34m
United Airlines
Deal found 4/5$458
This United Airlines deal was found by Cheapflights users on 4/6. 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.
Fri 9/115:00 am
DLH
-
SAN
2 stops11h 57m
United Airlines
Sun 9/131:53 pm
SAN
-
DLH
1 stop7h 34m
United Airlines
Deal found 4/6$464

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 April 9, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$378
(United Airlines)

One-way from

$310
(United Airlines)

Popular in

July

Cheapest in

December

Average price

$443
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. 16% potential increase in price ($94 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 April 9, 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

Fri 9/11

4:20 pm-8:21 pm

1 stop6h 01m

San Diego

Sun 9/13

4:30 pm-11:38 pm

1 stop5h 08m

$413

DuluthSan Diego

DLH - SAN

DLHSAN

Duluth Intl

Thu 4/23

3:08 pm-10:59 pm

1 stop9h 51m

San Diego

Mon 4/27

2:10 pm-12:29 am

1 stop8h 19m

$428

DuluthSan Diego

DLH - SAN

DLHSAN

Duluth Intl

Fri 5/1

4:29 pm-8:42 pm

1 stop6h 13m

San Diego

Thu 5/7

3:30 pm-10:44 pm

1 stop5h 14m

$433

DuluthSan Diego

DLH - SAN

DLHSAN

Duluth Intl

Tue 4/21

11:19 am-9:30 pm

2 stops12h 11m

San Diego

Sat 4/25

10:52 am-10:06 pm

1 stop9h 14m

$434

DuluthSan Diego

DLH - SAN

DLHSAN

Duluth Intl

Fri 9/11

5:00 am-2:57 pm

2 stops11h 57m

San Diego

Sun 9/13

1:53 pm-11:27 pm

1 stop7h 34m

$464

DuluthSan Diego

DLH - SAN

DLHSAN

Duluth Intl

Sat 9/19

5:00 am-5:00 pm

2 stops14h 00m

San Diego

Wed 9/23

1:53 pm-11:27 pm

1 stop7h 34m

$464
Cheapest one-way
Quickest one-way

DuluthSan Diego

DLH - SAN

DLHSAN

Duluth Intl

Mon 5/4

2:57 pm-9:15 am

2 stops20h 18m

$310

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/9

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 April.
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

How much does it cost to fly round-trip from Duluth 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 9, 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
8,392 reviews

Comfort

7.9

Boarding

8.1

Overall

7.9

Crew

8.5

Food

7.2

Entertainment

7.8

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
8,392 reviews
Delta
7.9
Good
8,392 reviews

Comfort

7.9

Boarding

8.1

Overall

7.9

Crew

8.5

Food

7.2

Entertainment

7.8

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?

    Delta and United Airlines can get you from Duluth to San Diego in just under 6h 01m. Your travel time can differ by up to 3h 50m. The distance from Duluth to San Diego is about 1634 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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 40% 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.

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

Browse thousands of different options on Cheapflights for your next trip

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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 April 9, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$288Average$443FlexibilityNo cancel feeOn-timeN/A

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