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Portsmouth

$355+ Cheap flights from Baltimore (BWI) 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 1/15. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — LHR
janv. 17 — janv. 241
sam. 1/17
sam. 1/24
1 adult, Economy
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Cheap flight deals from Baltimore to Portsmouth

Best flights from Baltimore to Portsmouth
Discover carefully curated flight deals from Baltimore to Portsmouth that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated décembre 18, 2025.

This British Airways deal was found by Cheapflights users on 12/15. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 1/288:35 pmBWI - SOU
2 stops19h 25mBritish Airways
dim. 2/18:25 pmSOU - BWI
2 stops51h 20mBritish Airways
Deal found 12/15$4,459
This British Airways deal was found by Cheapflights users on 12/16. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 1/178:35 pmBWI - SOU
2 stops18h 20mBritish Airways
sam. 1/315:15 pmSOU - BWI
2 stops30h 30mBritish Airways
Deal found 12/16$6,784
This British Airways deal was found by Cheapflights users on 12/16. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 1/178:35 pmBWI - SOU
2 stops18h 20mBritish Airways
dim. 2/18:40 amSOU - BWI
2 stops15h 05mBritish Airways
Deal found 12/16$7,461
This British Airways deal was found by Cheapflights users on 12/16. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 1/178:35 pmBWI - SOU
2 stops18h 20mBritish Airways
ven. 1/306:50 amSOU - BWI
2 stops16h 55mBritish Airways
Deal found 12/16$7,461
This British Airways deal was found by Cheapflights users on 12/16. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 1/168:35 pmBWI - SOU
2 stops15h 05mBritish Airways
sam. 1/316:50 amSOU - BWI
2 stops16h 55mBritish Airways
Deal found 12/16$7,467
This British Airways deal was found by Cheapflights users on 12/16. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 1/168:35 pmBWI - SOU
2 stops15h 05mBritish Airways
dim. 2/18:40 amSOU - BWI
2 stops15h 05mBritish Airways
Deal found 12/16$7,467
This British Airways deal was found by Cheapflights users on 12/16. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 1/168:35 pmBWI - SOU
2 stops15h 05mBritish Airways
ven. 1/306:50 amSOU - BWI
2 stops16h 55mBritish Airways
Deal found 12/16$7,467

Find flight deals from Baltimore to Portsmouth

Keep the following information in mind while searching for Baltimore to Portsmouth flight deals. Data was last updated décembre 18, 2025.

Most accurate provider

Gotogate
3 stars

Most trusted provider

Gotogate
3 stars

Round-trip from

$4,459
(British Airways)

One-way from

$355
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$978
Provider with most accurate pricing for Washington, D.C. (WAS)-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-London (LON) flights.
Search Deals
From Baltimore/Washington to Portsmouth
Search Deals
One-way flight from Baltimore/Washington to Portsmouth
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($51 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Baltimore 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 décembre 18, 2025.
Use the filters below to find and compare flights from Baltimore to Portsmouth that are best for you.

Fly from

Baltimore

Fly to

Portsmouth

Route

Depart

Return

Price

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

mer. 1/28

8:35 pm-9:00 pm

2 stops19h 25m

Southampton Eastleigh

dim. 2/1

8:25 pm-6:45 pm

2 stops51h 20m

$4,459

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

sam. 1/17

8:35 pm-7:55 pm

2 stops18h 20m

Southampton Eastleigh

sam. 1/31

5:15 pm-6:45 pm

2 stops30h 30m

$6,784

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

sam. 1/17

8:35 pm-7:55 pm

2 stops18h 20m

Southampton Eastleigh

dim. 2/1

8:40 am-6:45 pm

2 stops15h 05m

$7,461

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

sam. 1/17

8:35 pm-7:55 pm

2 stops18h 20m

Southampton Eastleigh

ven. 1/30

6:50 am-6:45 pm

2 stops16h 55m

$7,461

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

ven. 1/16

8:35 pm-4:40 pm

2 stops15h 05m

Southampton Eastleigh

sam. 1/31

6:50 am-6:45 pm

2 stops16h 55m

$7,467

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

ven. 1/16

8:35 pm-4:40 pm

2 stops15h 05m

Southampton Eastleigh

dim. 2/1

8:40 am-6:45 pm

2 stops15h 05m

$7,467

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

ven. 1/16

8:35 pm-4:40 pm

2 stops15h 05m

Southampton Eastleigh

ven. 1/30

6:50 am-6:45 pm

2 stops16h 55m

$7,467

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

jeu. 1/15

10:05 am-2:50 pm

3 stops47h 45m

$355

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

lun. 1/19

6:59 pm-5:05 pm

2 stops17h 06m

$473

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

jeu. 1/15

3:00 pm-5:05 pm

2 stops21h 05m

$473

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 11 results
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Best time to book a flight from Baltimore to Portsmouth

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

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

Currently, March is the cheapest month in which you can book a flight from Baltimore to Portsmouth (average of $31). Flying from Baltimore to Portsmouth in June is currently the most expensive (average of $725). 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 BWI to P0R?

Find hourly flight availability from Baltimore 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 décembre 18, 2025.

A simple way to save on the total cost of your ticket is to fly from Baltimore to Portsmouth in the afternoon. If you’re flexible enough to do this you can expect to save up to 13% on your trip compared to booking a flight at noon.

Related info for your journey

Find useful and relevant information for your journey from Baltimore 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 Baltimore to Portsmouth?

    Baltimore/Washington (BWI), located 8.5 mi from the city center, is the airport you fly out of when you book flights from Baltimore to Portsmouth. 10 airlines have flights from Baltimore/Washington to Portsmouth on a regular basis. Booking flights from Baltimore/Washington to Portsmouth should not be difficult; the airport handles an average of 0 outbound flights to Portsmouth per day.

  • How long is the flight from Baltimore to Portsmouth?

    For as low as $4,459, British Airways can have you in Portsmouth from Baltimore in 19h 25m. There are 3597 mi between Baltimore and Portsmouth.

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

    Consider American Airlines (83%), Aer Lingus (83%) or Finnair (83%) when booking your flight. These represent the most reliable airlines when flying from Baltimore to Portsmouth.

  • What are the cheapest flights from Baltimore to Portsmouth?

    The cheapest flight price from Baltimore to Portsmouth is $366. On average you can expect to pay $1,018. The most popular route, (Baltimore/Washington - Southampton Eastleigh), can usually be booked for $1,182.

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

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

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

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

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

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

    Currently, March is the cheapest month in which you can book a flight from Baltimore to Portsmouth (average of $31). Flying from Baltimore to Portsmouth in June is currently the most expensive (average of $725). 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

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Alternative routes for Baltimore to Portsmouth

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Top 10 airlines flying from Baltimore to Portsmouth

Discover the top 10 airlines that operate flights from Baltimore 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 décembre 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest$369Average$511FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$476Average$620FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$506Average$913FlexibilityNo cancel feeOn-time69%
KLMCheapest$520Average$615FlexibilityNo cancel feeOn-time75%
Virgin AtlanticCheapest$520Average$793FlexibilityNo cancel feeOn-time72%
IberiaCheapest$579Average$767FlexibilityNo cancel feeOn-time77%
FinnairCheapest$599Average$753FlexibilityNo cancel feeOn-time76%
DeltaCheapest$609Average$872FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$616Average$816FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$636Average$827FlexibilityNo cancel feeOn-time71%

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