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$432+ Cheap flights from Detroit (DTT) to Portsmouth, England

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 7/11. Fares are subject to change and may not be available on all flights or dates of travel.
DTT — LHR
Jul 6 — Jul 131
Sun 7/6
Sun 7/13
1 adult, Economy
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Cheap flight deals from Detroit to Portsmouth

Keep the following information in mind while searching for Detroit to Portsmouth flight deals. Data was last updated July 1, 2025.

Round-trip from

$911
(Delta)

One-way from

$432
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$1,010
From Detroit (DTT) to Portsmouth
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One-way flight from Detroit (DTT) to Portsmouth
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Highest demand for flights based on searches. 11% potential increase in price ($118 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($23 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Detroit to Portsmouth

Cheapest flights from Detroit to Portsmouth
Explore the most affordable flight options available from Detroit to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 1, 2025.

This Delta deal was found by Cheapflights users on 6/30. 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.
Sun 8/106:35 pmDTW - SOU
1 stop18h 15mDelta
Tue 8/269:20 amSOU - DTW
1 stop33h 15mDelta
Deal found 6/30$911
This KLM deal was found by Cheapflights users on 6/30. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/294:35 pmDTW - SOU
1 stop11h 10mKLM
Sun 9/76:25 pmSOU - DTW
1 stop22h 20mKLM
Deal found 6/30$1,211

Cheapflights Fare Finder

Customize your flight search to find flights from Detroit to Portsmouth 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 1, 2025.
Use the filters below to find and compare flights from Detroit to Portsmouth that are best for you.

Fly from

Detroit

Fly to

Portsmouth

Route

Depart

Return

Price

DetroitSouthampton

DTW - SOU

DTWSOU

Detroit Metropolitan Wayne County

Sun 8/10

6:35 pm-5:50 pm

1 stop18h 15m

Southampton Eastleigh

Tue 8/26

9:20 am-1:35 pm

1 stop33h 15m

$911

DetroitSouthampton

DTW - SOU

DTWSOU

Detroit Metropolitan Wayne County

Tue 12/23

2:00 pm-8:25 am

2 stops13h 25m

Southampton Eastleigh

Tue 12/30

9:00 am-7:13 pm

2 stops15h 13m

$1,082

DetroitSouthampton

DTW - SOU

DTWSOU

Detroit Metropolitan Wayne County

Mon 12/22

12:20 pm-8:45 am

2 stops15h 25m

Southampton Eastleigh

Wed 12/31

9:30 am-12:06 am

2 stops19h 36m

$1,528

DetroitSouthampton

DTW - SOU

DTWSOU

Detroit Metropolitan Wayne County

Fri 7/11

5:11 am-7:45 am

3 stops45h 34m

$432

DetroitSouthampton

DTW - SOU

DTWSOU

Detroit Metropolitan Wayne County

Sun 9/28

6:30 pm-5:00 pm

1 stop17h 30m

$548

DetroitSouthampton

DTW - SOU

DTWSOU

Detroit Metropolitan Wayne County

Thu 10/16

2:00 pm-8:45 am

2 stops13h 45m

$601

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/29

Best time to book a flight from Detroit to Portsmouth

Have a flexible travel schedule? Discover the best time to fly to Portsmouth from Detroit 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 Detroit to Portsmouth

What is the cheapest month to book a flight from Detroit to Portsmouth?

Currently, November is the cheapest month in which you can book a flight from Detroit to Portsmouth (average of $661). Flying from Detroit to Portsmouth in June is currently the most expensive (average of $1,098). 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 DTT to P0R?

Find hourly flight availability from Detroit to Portsmouth. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 1, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Detroit to Portsmouth as you normally would.

What is the cheapest day to fly from Detroit to Portsmouth?

Use this chart to determine the cheapest time to fly round-trip from Detroit to Portsmouth. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Detroit to Portsmouth flight should consider departing on Sunday afternoons when fares are most often at their lowest. Thursday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Detroit to Portsmouth

Explore weekly flight availability from Detroit to Portsmouth. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 1, 2025.

The most flights from DTT to P0R are scheduled on a Monday (5 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (5 on average).

Reviews of airlines servicing Portsmouth

Get insights into the airlines that provide service to Portsmouth. 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 Portsmouth. Reviews last updated July 1, 2025.
Peruse reviews from past customers who have flown with Delta and KLM from Detroit to Portsmouth to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,974 reviews

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,974 reviews
Delta
8.0
Very good
7,974 reviews

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,366 reviews
Delta
8.0
Very good
7,974 reviews

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from Detroit to Portsmouth. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Detroit to Portsmouth?

    Located just 0.6 mi from the city center, Detroit All airports is the airport most travelers will use when flying to Portsmouth from Detroit. Booking flights from All airports (DTT) to Portsmouth should be relatively easy as there are 0 daily outbound flights to Portsmouth from 14 different airlines.

  • What are the most reliable airlines from Detroit to Portsmouth?

    The top 3 most reliable airlines when flying from Detroit to Portsmouth are KLM (83%), Air France (83%) and Scandinavian Airlines (83%).

  • What are the cheapest flights from Detroit to Portsmouth?

    While on average a flight from Detroit to Portsmouth is generally $2,095, our data shows the cheapest flight currently is $367. When looking at the most popular route, (Detroit Metropolitan Wayne County - Southampton Eastleigh), you can expect to pay $911 for that flight.

  • Can I find deals for flights from Detroit to Portsmouth that include hotel bookings?

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

  • How can I find direct flights from Detroit to Portsmouth?

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

  • Can I find deals for business class flights from Detroit to Portsmouth?

    Yes. Cheapflights offers flight deals from Detroit to Portsmouth 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 Detroit to Portsmouth?

    Currently, November is the cheapest month in which you can book a flight from Detroit to Portsmouth (average of $661). Flying from Detroit to Portsmouth in June is currently the most expensive (average of $1,098). 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.

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Top 10 airlines flying from Detroit to Portsmouth

Discover the top 10 airlines that operate flights from Detroit to Portsmouth. 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 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$60Average$126FlexibilityNo cancel feeOn-time65%
British AirwaysCheapest$504Average$814FlexibilityNo cancel feeOn-time70%
IcelandairCheapest$511Average$820FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$543Average$805FlexibilityNo cancel feeOn-time71%
Scandinavian AirlinesCheapest$603Average$821FlexibilityNo cancel feeOn-time77%
JetBlueCheapest$604Average$780FlexibilityNo cancel feeOn-time62%
IberiaCheapest$638Average$807FlexibilityNo cancel feeOn-time77%
Turkish AirlinesCheapest$653Average$683FlexibilityNo cancel feeOn-time77%
KLMCheapest$726Average$1,118FlexibilityNo cancel feeOn-time75%
Air FranceCheapest$730Average$1,050FlexibilityNo cancel feeOn-time77%

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