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Portsmouth

$408+ 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 9/5. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — LHR
Jun 7 — Jun 141
Sun 6/7
Sun 6/14
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 May 8, 2026.

This Delta deal was found by Cheapflights users on 5/4. 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 8/261:45 pm
BWI
-
SOU
2 stops22h 50m
Delta
Sun 8/309:15 am
SOU
-
BWI
2 stops18h 58m
Delta
Deal found 5/4$1,166
This Delta deal was found by Cheapflights users on 5/7. 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 5/1911:05 am
BWI
-
SOU
2 stops16h 30m
Delta
Mon 5/255:20 pm
SOU
-
BWI
2 stops28h 18m
Delta
Deal found 5/7$1,254
This KLM deal was found by Cheapflights users on 5/7. 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.
Mon 8/1712:30 pm
BWI
-
SOU
2 stops15h 15m
KLM
Tue 9/19:05 am
SOU
-
BWI
2 stops16h 46m
KLM
Deal found 5/7$1,292
This Delta deal was found by Cheapflights users on 5/4. 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 8/292:23 pm
BWI
-
SOU
2 stops13h 22m
Delta
Mon 9/79:05 am
SOU
-
BWI
2 stops18h 37m
Delta
Deal found 5/4$1,318
This Delta deal was found by Cheapflights users on 5/4. 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 7/11:29 pm
BWI
-
SOU
2 stops14h 06m
Delta
Tue 8/259:15 am
SOU
-
BWI
2 stops17h 15m
Delta
Deal found 5/4$1,384
This Delta deal was found by Cheapflights users on 5/4. 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 8/271:45 pm
BWI
-
SOU
2 stops14h 00m
Delta
Mon 8/319:05 am
SOU
-
BWI
2 stops16h 46m
Delta
Deal found 5/4$1,385
This KLM deal was found by Cheapflights users on 5/7. 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.
Sat 8/291:00 pm
BWI
-
SOU
2 stops14h 45m
KLM
Mon 9/79:05 am
SOU
-
BWI
2 stops16h 46m
KLM
Deal found 5/7$1,404
This Delta deal was found by Cheapflights users on 5/4. 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 5/157:41 pm
BWI
-
SOU
2 stops16h 09m
Delta
Thu 5/219:05 am
SOU
-
BWI
2 stops16h 45m
Delta
Deal found 5/4$1,437
This Delta deal was found by Cheapflights users on 5/4. 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 8/261:45 pm
BWI
-
SOU
2 stops14h 00m
Delta
Mon 8/319:05 am
SOU
-
BWI
2 stops16h 46m
Delta
Deal found 5/4$1,451
This Delta deal was found by Cheapflights users on 5/6. 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 5/216:00 am
BWI
-
SOU
2 stops21h 35m
Delta
Mon 5/259:05 am
SOU
-
BWI
2 stops18h 44m
Delta
Deal found 5/6$1,510

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 May 8, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,166
(KLM)

One-way from

$408
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$830
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. 15% potential increase in price ($135 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($26 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 May 8, 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

Wed 8/26

1:45 pm-5:35 pm

2 stops22h 50m

Southampton Eastleigh

Sun 8/30

9:15 am-11:13 pm

2 stops18h 58m

$1,166

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

Tue 5/19

11:05 am-8:35 am

2 stops16h 30m

Southampton Eastleigh

Wed 5/27

9:05 am-11:17 pm

2 stops19h 12m

$1,254

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

Tue 5/19

11:05 am-8:35 am

2 stops16h 30m

Southampton Eastleigh

Mon 5/25

5:20 pm-4:38 pm

2 stops28h 18m

$1,254

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

Tue 5/19

11:05 am-8:35 am

2 stops16h 30m

Southampton Eastleigh

Thu 5/28

9:05 am-11:17 pm

2 stops19h 12m

$1,254
Quickest round-trip

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

Thu 8/27

1:45 pm-8:45 am

2 stops14h 00m

Southampton Eastleigh

Mon 8/31

9:05 am-8:51 pm

2 stops16h 46m

$1,385

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

Sat 8/29

1:00 pm-8:45 am

2 stops14h 45m

Southampton Eastleigh

Mon 9/7

9:05 am-8:51 pm

2 stops16h 46m

$1,404

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

Thu 5/21

12:31 pm-8:35 am

2 stops15h 04m

Southampton Eastleigh

Sun 5/24

9:15 am-12:52 am

2 stops20h 37m

$1,510

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

Fri 6/5

12:00 pm-8:45 am

2 stops15h 45m

Southampton Eastleigh

Sat 6/13

9:15 am-8:09 pm

2 stops15h 54m

$1,541

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

Sun 9/27

9:35 pm-8:55 pm

2 stops18h 20m

Southampton Eastleigh

Thu 10/1

7:55 pm-7:40 pm

2 stops52h 45m

$4,702

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

Mon 8/24

9:30 pm-9:45 am

2 stops31h 15m

Southampton Eastleigh

Wed 8/26

3:15 pm-7:40 pm

2 stops33h 25m

$4,711

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/6

Showing 1-10 of 21 resultsSorted by cheapest first
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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 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 May 8, 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. 8 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 $1,166, Delta can have you in Portsmouth from Baltimore in 22h 50m. 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 $369. On average you can expect to pay $1,367. The most popular route, (Baltimore/Washington - Southampton Eastleigh), can usually be booked for $1,292.

  • 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.

See more FAQs

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Top 8 airlines flying from Baltimore to Portsmouth

Discover the top 8 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 May 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$462Average$886FlexibilityNo cancel feeOn-time69%
Virgin AtlanticCheapest$471Average$709FlexibilityNo cancel feeOn-time72%
IcelandairCheapest$475Average$686FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$590Average$827FlexibilityNo cancel feeOn-time70%
FinnairCheapest$591Average$767FlexibilityNo cancel feeOn-time76%
DeltaCheapest$598Average$880FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$602Average$868FlexibilityNo cancel feeOn-time71%
IberiaCheapest$606Average$887FlexibilityNo cancel feeOn-time77%

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