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$333+ 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 10/16. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — DLH
oct. 17 — oct. 241
vie. 10/17
vie. 10/24
1 adult, Economy
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Cheap 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 septiembre 17, 2025.

Round-trip from

$333
(Delta)

Popular in

August

Cheapest in

March

Average price

$388
From San Diego to Duluth Intl
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($61 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% 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 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 septiembre 17, 2025.

This Delta deal was found by Cheapflights users on 9/17. 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.
jue. 10/164:35 pmSAN - DLH
1 stop5h 07mDelta
dom. 10/195:18 amDLH - SAN
1 stop7h 29mDelta
Deal found 9/17$333
This Delta deal was found by Cheapflights users on 9/17. 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.
vie. 10/1710:30 pmSAN - DLH
2 stops10h 52mDelta
dom. 10/195:18 amDLH - SAN
1 stop7h 29mDelta
Deal found 9/17$339
This United Airlines deal was found by Cheapflights users on 9/15. 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.
mar. 9/3010:46 amSAN - DLH
1 stop9h 22mUnited Airlines
sáb. 10/48:00 amDLH - SAN
1 stop9h 50mUnited Airlines
Deal found 9/15$418
This Delta deal was found by Cheapflights users on 9/15. 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.
mié. 12/2411:50 amSAN - DLH
1 stop9h 02mDelta
lun. 12/2911:55 amDLH - SAN
1 stop13h 45mDelta
Deal found 9/15$463
This United Airlines deal was found by Cheapflights users on 9/15. 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.
jue. 9/256:53 amSAN - DLH
2 stops13h 15mUnited Airlines
lun. 9/299:45 amDLH - SAN
2 stops14h 00mUnited Airlines
Deal found 9/15$469
This Delta deal was found by Cheapflights users on 9/15. 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.
jue. 10/164:35 pmSAN - DLH
1 stop5h 07mDelta
lun. 10/204:10 pmDLH - SAN
1 stop6h 24mDelta
Deal found 9/15$493

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 septiembre 17, 2025.
Use the filters below to find and compare flights from San Diego to Duluth that are best for you.

Fly from

San Diego

Fly to

Duluth

Route

Depart

Return

Price

San DiegoDuluth

SAN - DLH

SANDLH

San Diego

jue. 10/16

4:35 pm-11:42 pm

1 stop5h 07m

Duluth Intl

dom. 10/19

5:18 am-10:47 am

1 stop7h 29m

$333

San DiegoDuluth

SAN - DLH

SANDLH

San Diego

vie. 10/17

10:30 pm-11:22 am

2 stops10h 52m

Duluth Intl

dom. 10/19

5:18 am-10:47 am

1 stop7h 29m

$339

San DiegoDuluth

SAN - DLH

SANDLH

San Diego

mié. 10/15

4:35 pm-11:42 pm

1 stop5h 07m

Duluth Intl

dom. 10/19

7:50 am-12:55 pm

1 stop7h 05m

$358

San DiegoDuluth

SAN - DLH

SANDLH

San Diego

mar. 9/30

10:15 am-10:08 pm

2 stops9h 53m

Duluth Intl

sáb. 10/4

8:00 am-3:50 pm

1 stop9h 50m

$424

San DiegoDuluth

SAN - DLH

SANDLH

San Diego

jue. 9/25

6:53 am-10:08 pm

2 stops13h 15m

Duluth Intl

lun. 9/29

9:45 am-9:45 pm

2 stops14h 00m

$469

San DiegoDuluth

SAN - DLH

SANDLH

San Diego

jue. 10/16

4:35 pm-11:42 pm

1 stop5h 07m

Duluth Intl

lun. 10/20

4:10 pm-8:34 pm

1 stop6h 24m

$493

San DiegoDuluth

SAN - DLH

SANDLH

San Diego

jue. 10/16

6:48 am-6:37 pm

1 stop9h 49m

$337

San DiegoDuluth

SAN - DLH

SANDLH

San Diego

vie. 10/17

11:08 am-10:08 pm

2 stops9h 00m

$343

San DiegoDuluth

SAN - DLH

SANDLH

San Diego

jue. 10/16

10:00 am-11:42 pm

2 stops11h 42m

$370

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/17

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

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

Currently, January is the cheapest month in which you can book a flight from San Diego to Duluth (average of $339). Flying from San Diego to Duluth in June is currently the most expensive (average of $476). 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.

What is the cheapest time of day to fly from SAN to DLH?

Find hourly flight availability from San Diego to Duluth. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated septiembre 17, 2025.

It’s typically best to fly out from San Diego to Duluth at noon. Doing so could potentially save you 27% on the flight price compared to flying in the morning, which is usually more expensive.

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

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 septiembre 17, 2025.
See what other customers who have flown with Delta 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
8.0
Very good
7,961 reviews

Overall

8.0

Boarding

8.2

Food

7.3

Comfort

7.9

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin
Delta
8.0
Very good
7,961 reviews
Delta
8.0
Very good
7,961 reviews

Overall

8.0

Boarding

8.2

Food

7.3

Comfort

7.9

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin

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 5h 07m. Fly via Delta to get the fastest option. The distance between San Diego and Duluth is about 1634 mi.

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

    Flying on Delta is currently your cheapest option to Duluth, with prices starting at $288. Delta is priced at 41% 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.

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

    Currently, January is the cheapest month in which you can book a flight from San Diego to Duluth (average of $339). Flying from San Diego to Duluth in June is currently the most expensive (average of $476). 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 Duluth?

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

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Top airline flying from San Diego to Duluth

Discover the top airline 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 septiembre 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$288Average$473FlexibilityNo cancel feeOn-timeN/A

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