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$350+ 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 8/23. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — LHR
May 4 — May 111
Sun 5/4
Sun 5/11
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 April 29, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$1,174
(Cheapflightsfares)

One-way from

$496
(KLM)

Popular in

June

Cheapest in

January

Average price

$711
Provider with most accurate pricing for Washington, D.C. (WAS)-London (LON) flight deals.
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Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-London (LON) flights.
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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. 13% potential increase in price ($113 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($22 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 29, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 4/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/249:20 pmBWI - SOU
2 stops30h 20mAer Lingus
Sun 8/319:10 amSOU - BWI
2 stops15h 25mAer Lingus
Deal found 4/29$1,174
This Delta deal was found by Cheapflights users on 4/29. 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 6/121:00 pmBWI - SOU
2 stops14h 45mDelta
Thu 6/199:20 amSOU - BWI
2 stops16h 23mDelta
Deal found 4/29$1,261
This Mytrip deal was found by Cheapflights users on 4/29. 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.
Thu 6/128:30 pmBWI - SOU
2 stops18h 00mMultiple Airlines
Thu 6/198:00 amSOU - BWI
3 stops16h 25mMultiple Airlines
Deal found 4/29$1,412
This KAYAK deal was found by Cheapflights users on 4/29. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/229:20 pmBWI - SOU
2 stops13h 40mBritish Airways
Mon 7/78:30 amSOU - BWI
2 stops16h 05mBritish Airways
Deal found 4/29$3,413

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 April 29, 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

Sun 8/24

9:20 pm-8:40 am

2 stops30h 20m

Southampton Eastleigh

Sun 8/31

9:10 am-7:35 pm

2 stops15h 25m

$1,174

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

Thu 6/12

1:00 pm-8:45 am

2 stops14h 45m

Southampton Eastleigh

Thu 6/19

9:20 am-8:43 pm

2 stops16h 23m

$1,261

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

Thu 6/12

8:30 pm-7:30 pm

2 stops18h 00m

Southampton Eastleigh

Thu 6/19

8:00 am-7:25 pm

3 stops16h 25m

$1,412

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

Sun 6/22

9:20 pm-4:00 pm

2 stops13h 40m

Southampton Eastleigh

Mon 7/7

8:30 am-7:35 pm

2 stops16h 05m

$3,413

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

Sat 8/23

6:50 pm-9:10 am

2 stops33h 20m

$350

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

Sat 7/26

2:20 pm-8:45 am

2 stops13h 25m

$496

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

Sat 8/23

9:20 pm-9:10 am

2 stops30h 50m

$676

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

Sun 5/25

1:52 pm-8:50 am

2 stops37h 58m

$930

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

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 $1,110). 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 April 29, 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.

What is the cheapest day to fly from Baltimore to Portsmouth?

Use this chart to determine the cheapest time to fly round-trip from Baltimore to Portsmouth. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Baltimore to Portsmouth flight should consider departing on Friday mornings when fares are most often at their lowest. Friday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 April 29, 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).

Rainfall in Portsmouth by month

Plan your trip to Portsmouth by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Portsmouth ranges from 1.0 - 3.0 inches per month. December is typically the wettest month, when rainfall can reach 3.0 in. July is typically the driest time to visit Portsmouth when rainfall is around 1.0 in.

Temperature in Portsmouth by month

Plan your trip to Portsmouth by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Portsmouth, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 64.4 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 39.2 F).

Reviews of airlines servicing Portsmouth

Get insights into the airlines that provide service to Portsmouth. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Portsmouth. Reviews last updated April 29, 2025.
Delta
8.0
Very good
7,936 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,936 reviews
Delta
8.0
Very good
7,936 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,333 reviews
Delta
8.0
Very good
7,936 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Aer Lingus
7.0
Good
1,076 reviews
Delta
8.0
Very good
7,936 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
British Airways
6.6
Okay
6,837 reviews
Delta
8.0
Very good
7,936 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

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

    Consider American Airlines (55%), Aer Lingus (55%) or Finnair (55%) 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 $392. On average you can expect to pay $1,319. The most popular route, (Baltimore/Washington - Southampton Eastleigh), can usually be booked for $898.

  • 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 $1,110). 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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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 April 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest$369Average$514FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$474Average$617FlexibilityNo cancel feeOn-time76%
IberiaCheapest$582Average$757FlexibilityNo cancel feeOn-time77%
Virgin AtlanticCheapest$585Average$829FlexibilityNo cancel feeOn-time72%
United AirlinesCheapest$601Average$988FlexibilityNo cancel feeOn-time69%
FinnairCheapest$603Average$762FlexibilityNo cancel feeOn-time76%
DeltaCheapest$631Average$880FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$632Average$854FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$635Average$879FlexibilityNo cancel feeOn-time71%

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