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Portsmouth

$499+ 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 9/26. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — LHR
oct. 16 — oct. 231
jue. 10/16
jue. 10/23
1 adult, Economy
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Cheap flight deals from Baltimore to Portsmouth

Keep the following information in mind while searching for Baltimore to Portsmouth flight deals. Data was last updated septiembre 16, 2025.

Round-trip from

$819
(Delta)

One-way from

$499
(KLM)

Popular in

June

Cheapest in

September

Average price

$636
From Baltimore/Washington to Portsmouth
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One-way flight from Baltimore/Washington to Portsmouth
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Highest demand for flights based on searches. 11% potential increase in price ($98 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($20 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 septiembre 16, 2025.

This Delta deal was found by Cheapflights users on 9/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/11:00 pmBWI - SOU
2 stops23h 00mDelta
dom. 10/59:20 amSOU - BWI
2 stops18h 37mDelta
Deal found 9/15$819
This Mytrip deal was found by Cheapflights users on 9/15. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/18:30 pmBWI - SOU
2 stops18h 00mMultiple Airlines
dom. 10/56:25 pmSOU - BWI
3 stops30h 00mMultiple Airlines
Deal found 9/15$1,010
This Mytrip deal was found by Cheapflights users on 9/14. 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.
mié. 10/298:40 pmBWI - SOU
2 stops16h 40mMultiple Airlines
mié. 11/58:10 pmSOU - BWI
3 stops29h 22mMultiple Airlines
Deal found 9/14$1,146
This Delta deal was found by Cheapflights users on 9/14. 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.
jue. 10/910:18 amBWI - SOU
2 stops17h 27mDelta
vie. 10/249:20 amSOU - BWI
2 stops18h 53mDelta
Deal found 9/14$1,647

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 septiembre 16, 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

mié. 10/1

1:00 pm-5:00 pm

2 stops23h 00m

Southampton Eastleigh

dom. 10/5

9:20 am-10:57 pm

2 stops18h 37m

$819

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

mié. 10/1

8:30 pm-7:30 pm

2 stops18h 00m

Southampton Eastleigh

dom. 10/5

6:25 pm-7:25 pm

3 stops30h 00m

$1,010

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

mié. 10/29

8:40 pm-5:20 pm

2 stops16h 40m

Southampton Eastleigh

mié. 11/5

8:10 pm-8:32 pm

3 stops29h 22m

$1,146

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

vie. 3/6

8:35 pm-8:25 am

2 stops30h 50m

Southampton Eastleigh

sáb. 3/21

3:45 pm-7:45 pm

2 stops32h 00m

$1,201

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

jue. 10/9

10:18 am-8:45 am

2 stops17h 27m

Southampton Eastleigh

vie. 10/24

9:20 am-11:13 pm

2 stops18h 53m

$1,647

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

vie. 9/26

1:00 pm-8:45 am

2 stops14h 45m

$499

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

sáb. 11/22

6:00 am-8:50 am

2 stops21h 50m

$584

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

vie. 11/21

9:05 am-5:00 pm

2 stops26h 55m

$584

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

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, November is the cheapest month in which you can book a flight from Baltimore to Portsmouth (average of $661). Flying from Baltimore to Portsmouth in June is currently the most expensive (average of $1,097). 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 septiembre 16, 2025.

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.

Weekly flight availability from Baltimore to Portsmouth

Explore weekly flight availability from Baltimore 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 septiembre 16, 2025.

The most flights from BWI 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).

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. 11 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 $819, Delta can have you in Portsmouth from Baltimore in 23h. There are 3597 mi between Baltimore and Portsmouth.

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

    Consider Iberia (70%), American Airlines (67%) or Finnair (64%) 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 $384. On average you can expect to pay $1,232. The most popular route, (Baltimore/Washington - Southampton Eastleigh), can usually be booked for $761.

  • 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, November is the cheapest month in which you can book a flight from Baltimore to Portsmouth (average of $661). Flying from Baltimore to Portsmouth in June is currently the most expensive (average of $1,097). 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 septiembre 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest$369Average$502FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$472Average$606FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$506Average$905FlexibilityNo cancel feeOn-time69%
KLMCheapest$520Average$615FlexibilityNo cancel feeOn-time75%
Virgin AtlanticCheapest$520Average$792FlexibilityNo cancel feeOn-time72%
Aer LingusCheapest$554Average$952FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$583Average$767FlexibilityNo cancel feeOn-time77%
FinnairCheapest$599Average$757FlexibilityNo cancel feeOn-time76%
DeltaCheapest$615Average$891FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$632Average$830FlexibilityNo cancel feeOn-time70%

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