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$308+ Cheap flights from Duluth to Philadelphia (DLH - PHL)

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 8/27. Fares are subject to change and may not be available on all flights or dates of travel.
DLH — PHL
Aug 21 — Aug 281
Fri 8/21
Fri 8/28
1 adult, Economy
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Cheap flight deals from Duluth to Philadelphia

Cheapest flights from Duluth to Philadelphia
Explore the most affordable flight options available from Duluth to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 22, 2026.

This United Airlines deal was found by Cheapflights users on 7/21. 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 8/276:23 pm
DLH
-
PHL
1 stop5h 36m
United Airlines
Mon 9/76:56 pm
PHL
-
DLH
1 stop5h 26m
United Airlines
Deal found 7/21$308
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/104:11 pm
DLH
-
PHL
1 stop6h 45m
Delta
Tue 8/185:45 am
PHL
-
DLH
1 stop6h 16m
Delta
Deal found 7/20$318
This United Airlines deal was found by Cheapflights users on 7/19. 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 8/46:25 pm
DLH
-
PHL
1 stop5h 32m
United Airlines
Sat 8/87:00 pm
PHL
-
DLH
1 stop5h 23m
United Airlines
Deal found 7/19$358
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.
Tue 8/116:23 pm
DLH
-
PHL
1 stop5h 36m
United Airlines
Mon 8/176:56 pm
PHL
-
DLH
1 stop5h 26m
United Airlines
Deal found 7/20$388
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/104:11 pm
DLH
-
PHL
1 stop6h 45m
Delta
Sun 8/235:45 am
PHL
-
DLH
1 stop6h 16m
Delta
Deal found 7/20$392
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/145:15 am
DLH
-
PHL
1 stop4h 32m
Delta
Fri 8/215:45 am
PHL
-
DLH
1 stop6h 16m
Delta
Deal found 7/20$398
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/104:11 pm
DLH
-
PHL
1 stop6h 45m
Delta
Sat 8/226:59 pm
PHL
-
DLH
2 stops25h 45m
Delta
Deal found 7/20$414
This United Airlines deal was found by Cheapflights users on 7/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/146:23 pm
DLH
-
PHL
1 stop5h 36m
United Airlines
Thu 8/2010:34 am
PHL
-
DLH
1 stop8h 00m
United Airlines
Deal found 7/17$418
This United Airlines deal was found by Cheapflights users on 7/21. 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 8/56:25 pm
DLH
-
PHL
1 stop5h 32m
United Airlines
Wed 8/126:56 pm
PHL
-
DLH
1 stop5h 26m
United Airlines
Deal found 7/21$423
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/104:11 pm
DLH
-
PHL
1 stop6h 45m
Delta
Fri 8/215:15 am
PHL
-
DLH
2 stops15h 29m
Delta
Deal found 7/20$444
This United Airlines deal was found by Cheapflights users on 7/18. 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 7/316:25 pm
DLH
-
PHL
1 stop5h 32m
United Airlines
Mon 8/35:00 pm
PHL
-
DLH
1 stop7h 23m
United Airlines
Deal found 7/18$458

Find flight deals from Duluth to Philadelphia

Discover tips and strategies to find the most affordable flight options for your journey from Duluth (DLH) to Philadelphia (PHL). 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 22, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$308
(United Airlines)

Popular in

August

Cheapest in

November

Average price

$392
Provider with most accurate pricing for Duluth Intl-Philadelphia flight deals.
Search Deals
Provider most trusted by Cheapflights users for Duluth Intl-Philadelphia flights.
Search Deals
From Duluth Intl to Philadelphia
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($48 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($33 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 Duluth to Philadelphia 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 22, 2026.
Use the filters below to find and compare flights from Duluth to Philadelphia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DuluthPhiladelphia

DLH - PHL

DLHPHL

Duluth Intl

Thu 8/27

6:23 pm-12:59 am

1 stop5h 36m

Philadelphia

Sun 9/6

6:56 pm-11:22 pm

1 stop5h 26m

$308

DuluthPhiladelphia

DLH - PHL

DLHPHL

Duluth Intl

Thu 8/27

5:15 am-10:47 am

1 stop4h 32m

Philadelphia

Mon 9/7

5:45 am-11:01 am

1 stop6h 16m

$308

DuluthPhiladelphia

DLH - PHL

DLHPHL

Duluth Intl

Tue 8/18

6:23 pm-12:59 am

1 stop5h 36m

Philadelphia

Tue 8/25

6:25 am-10:42 am

1 stop5h 17m

$308

DuluthPhiladelphia

DLH - PHL

DLHPHL

Duluth Intl

Thu 8/13

4:11 pm-11:56 pm

1 stop6h 45m

Philadelphia

Sat 8/22

6:54 pm-10:41 pm

1 stop4h 47m

$318

DuluthPhiladelphia

DLH - PHL

DLHPHL

Duluth Intl

Tue 8/4

6:25 pm-12:57 am

1 stop5h 32m

Philadelphia

Sat 8/8

7:00 pm-11:23 pm

1 stop5h 23m

$358

DuluthPhiladelphia

DLH - PHL

DLHPHL

Duluth Intl

Tue 8/11

6:23 pm-12:59 am

1 stop5h 36m

Philadelphia

Tue 8/18

10:34 am-5:34 pm

1 stop8h 00m

$388
Quickest round-trip

DuluthPhiladelphia

DLH - PHL

DLHPHL

Duluth Intl

Fri 8/14

5:15 am-10:47 am

1 stop4h 32m

Philadelphia

Sat 8/22

6:54 pm-10:41 pm

1 stop4h 47m

$398

DuluthPhiladelphia

DLH - PHL

DLHPHL

Duluth Intl

Fri 8/14

6:23 pm-12:59 am

1 stop5h 36m

Philadelphia

Thu 8/20

10:34 am-5:34 pm

1 stop8h 00m

$418

DuluthPhiladelphia

DLH - PHL

DLHPHL

Duluth Intl

Wed 8/5

6:25 pm-12:57 am

1 stop5h 32m

Philadelphia

Wed 8/12

6:56 pm-11:22 pm

1 stop5h 26m

$423

DuluthPhiladelphia

DLH - PHL

DLHPHL

Duluth Intl

Sat 8/15

11:41 am-1:19 am

2 stops12h 38m

Philadelphia

Tue 8/18

6:55 pm-10:41 pm

1 stop4h 46m

$492

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/20

Showing 1-10 of 14 resultsSorted by cheapest first
1
2

Compare providers for flights from Duluth to Philadelphia

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

Have a flexible travel schedule? Discover the best time to fly to Philadelphia 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 Philadelphia

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

Currently, November is the cheapest month in which you can book a flight from Duluth to Philadelphia (average of $357). Flying from Duluth to Philadelphia in August is currently the most expensive (average of $872). 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 Philadelphia

Get insights into the airlines that provide service to Philadelphia. 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 Philadelphia. Reviews last updated July 22, 2026.
Get a feel of what it's like to fly with Delta and United Airlines from Duluth to Philadelphia by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.8
Good
8,476 reviews

Overall

7.8

Crew

8.5

Comfort

7.8

Entertainment

7.8

Boarding

8.1

Food

7.2

Reviews

1 / 20
8.0
Excellent

Rona,Feb 2024

MSP - DEN

It was a good experience other than a short delay.
Delta
7.8
Good
8,476 reviews
Delta
7.8
Good
8,476 reviews

Overall

7.8

Crew

8.5

Comfort

7.8

Entertainment

7.8

Boarding

8.1

Food

7.2

Reviews

1 / 20
8.0
Excellent

Rona,Feb 2024

MSP - DEN

It was a good experience other than a short delay.
United Airlines
7.4
Good
10,020 reviews
Delta
7.8
Good
8,476 reviews

Overall

7.8

Crew

8.5

Comfort

7.8

Entertainment

7.8

Boarding

8.1

Food

7.2

Reviews

1 / 20
8.0
Excellent

Rona,Feb 2024

MSP - DEN

It was a good experience other than a short delay.

Related info for your journey

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

    For as low as $308, United Airlines can have you in Philadelphia from Duluth in 4h 32m. The distance between Duluth and Philadelphia is about 975 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    According to our current data, Delta ($263), and United Airlines ($271) offers the cheapest pricing from Duluth to Philadelphia. You may be able to fly from Duluth to Philadelphia for 48% less than the average price by searching for these airlines.

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

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

  • How can I find direct flights from Duluth to Philadelphia?

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

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

    Yes. Cheapflights offers flight deals from Duluth to Philadelphia 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 Philadelphia?

    Currently, November is the cheapest month in which you can book a flight from Duluth to Philadelphia (average of $357). Flying from Duluth to Philadelphia in August is currently the most expensive (average of $872). 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 Philadelphia?

Book flights to Philadelphia if you plan to visit one of these locations
Wildwood
King of Prussia
Reading
Camden
Ocean City
Cherry Hill
Lewes
Plymouth Meeting
Wyomissing
Wildwood Crest
Pottstown
Ephrata
Milford
Dover
Elkton
Essington
Willow Grove
New Castle
Millville
Vineland

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Duluth to Philadelphia

Discover the top 2 airlines that operate flights from Duluth to Philadelphia. 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 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$263Average$402FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$271Average$502FlexibilityNo cancel feeOn-time69%

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