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Portsmouth

$838+ Cheap flights from Detroit (DTT) to Portsmouth, England

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 12/1. Fares are subject to change and may not be available on all flights or dates of travel.
DTT — LHR
dez 4 — dez 111
qui 12/4
qui 12/11
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 novembro 4, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$838
(Air France)

Popular in

June

Cheapest in

October

Average price

$828
Provider with most accurate pricing for Detroit (DTT)-London (LON) flight deals.
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Provider most trusted by Cheapflights users for Detroit (DTT)-London (LON) flights.
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From Detroit (DTT) to Portsmouth
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Highest demand for flights based on searches. 9% potential increase in price ($98 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in November 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 novembro 4, 2025.

This Air France deal was found by Cheapflights users on 11/2. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
seg 12/18:35 pmDTW - SOU
1 stop15h 25mKLM
seg 12/86:05 pmSOU - DTW
1 stop28h 50mKLM
Deal found 11/2$838
This Delta deal was found by Cheapflights users on 11/2. 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.
seg 12/110:05 amDTW - SOU
2 stops17h 05mDelta
seg 12/88:40 amSOU - DTW
2 stops17h 27mDelta
Deal found 11/2$958
This Mytrip deal was found by Cheapflights users on 11/2. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
seg 12/17:11 amDTW - SOU
3 stops25h 54mMultiple Airlines
seg 12/87:55 pmSOU - DTW
2 stops27h 15mMultiple Airlines
Deal found 11/2$1,246

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 novembro 4, 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

seg 12/1

8:35 pm-5:00 pm

1 stop15h 25m

Southampton Eastleigh

seg 12/8

8:40 am-7:39 pm

2 stops15h 59m

$898

DetroitSouthampton

DTW - SOU

DTWSOU

Detroit Metropolitan Wayne County

seg 12/1

10:05 am-8:10 am

2 stops17h 05m

Southampton Eastleigh

seg 12/8

8:40 am-9:07 pm

2 stops17h 27m

$958

DetroitSouthampton

DTW - SOU

DTWSOU

Detroit Metropolitan Wayne County

seg 12/1

7:11 am-2:05 pm

3 stops25h 54m

Southampton Eastleigh

seg 12/8

7:55 pm-6:10 pm

2 stops27h 15m

$1,246

DetroitSouthampton

DTW - SOU

DTWSOU

Detroit Metropolitan Wayne County

dom 3/8

9:30 pm-5:00 pm

2 stops39h 30m

Southampton Eastleigh

qua 3/11

8:40 am-2:10 pm

1 stop33h 30m

$1,382

DetroitSouthampton

DTW - SOU

DTWSOU

Detroit Metropolitan Wayne County

dom 3/8

5:15 pm-8:20 am

1 stop11h 05m

Southampton Eastleigh

qua 3/11

8:40 am-2:10 pm

1 stop33h 30m

$1,416

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/2

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, August is the cheapest month in which you can book a flight from Detroit to Portsmouth (average of $136). Flying from Detroit to Portsmouth in June is currently the most expensive (average of $672). 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 novembro 4, 2025.

It’s optimal to fly from Detroit to Portsmouth in the morning. By choosing this option you can save up to 11% on the cost of your flight, compared to a flight in the afternoon.

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 Friday evenings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 13 different airlines.

  • How long is the flight from Detroit to Portsmouth?

    Departing from Detroit to Portsmouth will take you 15h 25m. There are 3733 mi between Detroit and Portsmouth. This flight may include one or multiple stops.

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

    The top 3 most reliable airlines when flying from Detroit to Portsmouth are KLM (73%), Air France (73%) and Scandinavian Airlines (73%).

  • What are the cheapest flights from Detroit to Portsmouth?

    While on average a flight from Detroit to Portsmouth is generally $2,500, our data shows the cheapest flight currently is $478. When looking at the most popular route, (Detroit Metropolitan Wayne County - Southampton Eastleigh), you can expect to pay $838 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, August is the cheapest month in which you can book a flight from Detroit to Portsmouth (average of $136). Flying from Detroit to Portsmouth in June is currently the most expensive (average of $672). 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 novembro 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$60Average$130FlexibilityNo cancel feeOn-time65%
JetBlueCheapest$70Average$759FlexibilityNo cancel feeOn-time62%
British AirwaysCheapest$504Average$801FlexibilityNo cancel feeOn-time70%
IcelandairCheapest$509Average$706FlexibilityNo cancel feeOn-time76%
IberiaCheapest$510Average$807FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$543Average$798FlexibilityNo cancel feeOn-time71%
Scandinavian AirlinesCheapest$555Average$803FlexibilityNo cancel feeOn-time77%
Turkish AirlinesCheapest$639Average$672FlexibilityNo cancel feeOn-time77%
KLMCheapest$713Average$1,256FlexibilityNo cancel feeOn-time75%
DeltaCheapest$719Average$1,155FlexibilityNo cancel feeOn-timeN/A

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