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$278+ Cheap flights from Duluth to San Diego (DLH - 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 10/21. Fares are subject to change and may not be available on all flights or dates of travel.
DLH — SAN
Jul 23 — Jul 301
Wed 7/23
Wed 7/30
1 adult, Economy
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Cheap 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 July 18, 2025.

Round-trip from

$278
(Delta)

Popular in

May

Cheapest in

January

Average price

$462
From Duluth Intl to San Diego
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($69 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($24 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

Find 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 July 18, 2025.

This Delta deal was found by Cheapflights users on 7/16. 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.
Tue 10/214:20 pmDLH - SAN
1 stop9h 04mDelta
Tue 10/286:20 amSAN - DLH
1 stop7h 01mDelta
Deal found 7/16$278
This United Airlines deal was found by Cheapflights users on 7/16. 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 10/23:07 pmDLH - SAN
1 stop9h 07mUnited Airlines
Tue 10/711:08 amSAN - DLH
2 stops9h 05mUnited Airlines
Deal found 7/16$398

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 July 18, 2025.
Use the filters below to find and compare flights from Duluth to San Diego that are best for you.

Fly from

Duluth

Fly to

San Diego

Route

Depart

Return

Price

DuluthSan Diego

DLH - SAN

DLHSAN

Duluth Intl

Tue 10/21

4:20 pm-11:24 pm

1 stop9h 04m

San Diego

Tue 10/28

6:20 am-3:21 pm

1 stop7h 01m

$278

DuluthSan Diego

DLH - SAN

DLHSAN

Duluth Intl

Thu 10/2

3:07 pm-10:14 pm

1 stop9h 07m

San Diego

Tue 10/7

11:08 am-10:13 pm

2 stops9h 05m

$398

DuluthSan Diego

DLH - SAN

DLHSAN

Duluth Intl

Wed 8/13

3:03 pm-10:44 pm

1 stop9h 41m

$337

DuluthSan Diego

DLH - SAN

DLHSAN

Duluth Intl

Thu 8/14

7:50 am-12:46 pm

1 stop6h 56m

$364

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/15

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, August is the cheapest month in which you can book a flight from Duluth to San Diego (average of $286). Flying from Duluth 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 July 18, 2025.
Read through reviews of airlines operating flights from Duluth to San Diego, such as Delta and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,958 reviews

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Comfort

7.9

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
7,958 reviews
Delta
8.0
Very good
7,958 reviews

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Comfort

7.9

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
United Airlines
7.4
Good
8,864 reviews
Delta
8.0
Very good
7,958 reviews

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Comfort

7.9

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 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.

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

    Cheapflights users have booked flights from Duluth to San Diego round-trip from $278. Another airline that can offer you cheap pricing is United Airlines. Users have found that Delta is 33% 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, August is the cheapest month in which you can book a flight from Duluth to San Diego (average of $286). Flying from Duluth 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
Coronado
Poway
National City
Lemon Grove
Imperial Beach
La Mesa
Alpine
Santee

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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 July 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$278Average$426FlexibilityNo cancel feeOn-timeN/A

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