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Portsmouth

$638+ 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 3/30. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — LHR
Apr 24 — May 11
Fri 4/24
Fri 5/1
1 adult, Economy
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Cheap flight deals from Baltimore to Portsmouth

Cheapest flights from Baltimore to Portsmouth
Explore the most affordable flight options available from Baltimore to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 25, 2026.

This Trip.com deal was found by Cheapflights users on 3/24. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/118:30 pm
BWI
-
SOU
2 stops18h 00m
Multiple Airlines
Sat 9/199:20 am
SOU
-
BWI
2 stops15h 05m
Multiple Airlines
Deal found 3/24$889
This Trip.com deal was found by Cheapflights users on 3/24. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/178:30 pm
BWI
-
SOU
2 stops18h 00m
Multiple Airlines
Sat 9/269:20 am
SOU
-
BWI
2 stops15h 05m
Multiple Airlines
Deal found 3/24$918
This Delta deal was found by Cheapflights users on 3/22. 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 10/1112:00 pm
BWI
-
SOU
2 stops23h 50m
Delta
Thu 10/295:30 pm
SOU
-
BWI
2 stops31h 16m
Delta
Deal found 3/22$1,117
This Delta deal was found by Cheapflights users on 3/22. 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.
Sat 10/175:33 pm
BWI
-
SOU
2 stops34h 02m
Delta
Wed 10/288:40 am
SOU
-
BWI
2 stops18h 15m
Delta
Deal found 3/22$1,123
This KLM deal was found by Cheapflights users on 3/21. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2112:27 pm
BWI
-
SOU
2 stops15h 08m
KLM
Tue 4/289:05 am
SOU
-
BWI
2 stops20h 33m
KLM
Deal found 3/21$1,127
This Delta deal was found by Cheapflights users on 3/22. 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 10/116:10 am
BWI
-
SOU
2 stops29h 40m
Delta
Sun 11/19:30 am
SOU
-
BWI
2 stops19h 41m
Delta
Deal found 3/22$1,167
This Delta deal was found by Cheapflights users on 3/22. 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.
Sat 10/175:33 pm
BWI
-
SOU
2 stops34h 02m
Delta
Fri 10/305:30 pm
SOU
-
BWI
2 stops29h 16m
Delta
Deal found 3/22$1,173
This Delta deal was found by Cheapflights users on 3/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/57:26 pm
BWI
-
SOU
2 stops16h 24m
Delta
Tue 5/129:05 am
SOU
-
BWI
2 stops16h 42m
Delta
Deal found 3/21$1,177
This Delta deal was found by Cheapflights users on 3/22. 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.
Tue 10/137:40 pm
BWI
-
SOU
2 stops16h 10m
Delta
Wed 10/288:40 am
SOU
-
BWI
2 stops18h 15m
Delta
Deal found 3/22$1,179
This Delta deal was found by Cheapflights users on 3/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/121:00 pm
BWI
-
SOU
2 stops14h 45m
Delta
Wed 8/269:15 am
SOU
-
BWI
2 stops17h 58m
Delta
Deal found 3/19$1,209
This Delta deal was found by Cheapflights users on 3/22. 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.
Thu 10/157:40 pm
BWI
-
SOU
2 stops16h 10m
Delta
Sat 10/319:25 am
SOU
-
BWI
2 stops28h 51m
Delta
Deal found 3/22$1,217

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 March 25, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$889
(Trip.com)

One-way from

$638
(Delta)

Popular in

June

Cheapest in

September

Average price

$702
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. 11% potential increase in price ($100 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
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 March 25, 2026.
Use the filters below to find and compare flights from Baltimore to Portsmouth that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

Fri 9/11

8:30 pm-7:30 pm

2 stops18h 00m

Southampton Eastleigh

Sat 9/19

9:20 am-7:25 pm

2 stops15h 05m

$889

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

Thu 9/17

8:30 pm-7:30 pm

2 stops18h 00m

Southampton Eastleigh

Sat 9/26

9:20 am-7:25 pm

2 stops15h 05m

$918

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

Tue 5/5

3:33 pm-4:50 pm

2 stops20h 17m

Southampton Eastleigh

Tue 5/12

5:20 pm-5:24 pm

2 stops29h 04m

$1,127

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

Wed 5/6

3:33 pm-4:50 pm

2 stops20h 17m

Southampton Eastleigh

Wed 5/13

9:05 am-8:47 pm

2 stops16h 42m

$1,127
Quickest round-trip

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

Sat 8/29

2:10 pm-8:45 am

2 stops13h 35m

Southampton Eastleigh

Mon 9/7

9:05 am-10:13 pm

2 stops18h 08m

$1,209

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

Wed 8/12

1:00 pm-8:45 am

2 stops14h 45m

Southampton Eastleigh

Wed 8/26

9:15 am-10:13 pm

2 stops17h 58m

$1,281

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

Mon 5/25

3:53 pm-8:35 am

2 stops35h 42m

Southampton Eastleigh

Tue 6/2

5:20 pm-11:17 pm

2 stops34h 57m

$1,323

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

Sun 7/19

10:00 am-8:45 am

2 stops17h 45m

Southampton Eastleigh

Fri 8/14

6:05 pm-7:22 pm

2 stops30h 17m

$1,360
Cheapest one-way

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

Wed 4/1

2:38 pm-4:50 pm

2 stops21h 12m

$638

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

Mon 3/30

4:43 pm-8:35 am

2 stops34h 52m

$638

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/20

Showing 1-10 of 13 resultsSorted by cheapest first
1
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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 $699). 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 March 25, 2026.

When flying from Baltimore to Portsmouth, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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. 9 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 $1,127, KLM can have you in Portsmouth from Baltimore in 20h 17m. There are 3597 mi between Baltimore and Portsmouth.

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

    Consider American Airlines (71%), Aer Lingus (71%) or Finnair (71%) 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 $332. On average you can expect to pay $1,616. The most popular route, (Baltimore/Washington - Southampton Eastleigh), can usually be booked for $889.

  • 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 $699). 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

Browse thousands of different options on Cheapflights for your next trip

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Top 9 airlines flying from Baltimore to Portsmouth

Discover the top 9 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 March 25, 2026.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest$406Average$468FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$462Average$862FlexibilityNo cancel feeOn-time69%
IcelandairCheapest$481Average$644FlexibilityNo cancel feeOn-time76%
Virgin AtlanticCheapest$520Average$715FlexibilityNo cancel feeOn-time72%
FinnairCheapest$585Average$740FlexibilityNo cancel feeOn-time76%
IberiaCheapest$595Average$773FlexibilityNo cancel feeOn-time77%
DeltaCheapest$598Average$823FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$599Average$813FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$606Average$853FlexibilityNo cancel feeOn-time71%

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