HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Portsmouth

$439+ 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 8/15. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — LHR
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Baltimore to Portsmouth with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 July 31, 2025.

Round-trip from

$827
(Delta)

One-way from

$439
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$808
From Baltimore/Washington to Portsmouth
Search Deals
One-way flight from Baltimore/Washington to Portsmouth
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($99 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 July 2025
Search Deals

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 July 31, 2025.

This KLM deal was found by Cheapflights users on 7/29. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/51:08 pmBWI - SOU
2 stops14h 37mKLM
Mon 8/186:25 pmSOU - BWI
2 stops26h 26mKLM
Deal found 7/29$827
This Delta deal was found by Cheapflights users on 7/29. 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.
Tue 12/236:05 amBWI - SOU
2 stops29h 55mDelta
Mon 12/298:40 amSOU - BWI
2 stops44h 11mDelta
Deal found 7/29$913
This Mytrip deal was found by Cheapflights users on 7/30. 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.
Sat 9/138:30 pmBWI - SOU
2 stops14h 35mMultiple Airlines
Sat 9/208:25 amSOU - BWI
2 stops16h 00mMultiple Airlines
Deal found 7/30$994

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 July 31, 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

Wed 9/10

1:35 pm-5:00 pm

2 stops22h 25m

Southampton Eastleigh

Wed 9/24

9:20 am-12:28 am

2 stops20h 08m

$827

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

Sat 9/13

8:30 pm-4:05 pm

2 stops14h 35m

Southampton Eastleigh

Sat 9/20

8:25 am-7:25 pm

2 stops16h 00m

$994

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

Fri 8/15

6:50 pm-8:35 am

2 stops32h 45m

$439

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

Fri 9/26

1:00 pm-8:45 am

2 stops14h 45m

$499

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

Tue 12/23

6:02 am-8:10 am

2 stops21h 08m

$568

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

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 July 31, 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 July 31, 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).

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 July 31, 2025.
Read reviews from past customers who have flown Delta and KLM from Baltimore to Portsmouth. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,981 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,383 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 (53%), Aer Lingus (52%) or British Airways (52%) 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 $298. On average you can expect to pay $2,103. The most popular route, (Baltimore/Washington - Southampton Eastleigh), can usually be booked for $827.

  • 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Baltimore to Portsmouth

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Heathrow flights
Baltimore to Heathrow flights
Philadelphia to Heathrow flights
Reagan-National to Heathrow flights
Dulles Intl to Gatwick flights
Dulles Intl to London City flights
Baltimore to Gatwick flights
Reagan-National to Gatwick flights
Dulles Intl to Stansted flights
Dulles Intl to Edinburgh flights
Baltimore to Stansted flights
Dulles Intl to Luton flights
Philadelphia to Gatwick flights
Philadelphia to London City flights
Baltimore to Luton flights
Philadelphia to Stansted flights
Philadelphia to Luton flights
Baltimore to London City flights
Reagan-National to London City flights
Philadelphia to Edinburgh flights
Baltimore to Edinburgh flights
Reagan-National to Edinburgh flights
Reagan-National to Stansted flights
Dulles Intl to Manchester flights
Baltimore to Manchester flights
Philadelphia to Manchester flights
Dulles Intl to Newcastle upon Tyne flights
Reagan-National to Luton flights
Reagan-National to Manchester flights
Baltimore to Newcastle upon Tyne flights
Reagan-National to Newcastle upon Tyne flights
Dulles Intl to Birmingham flights
Dulles Intl to Southampton flights
Reagan-National to Birmingham flights
Baltimore to Birmingham flights
Philadelphia to Leeds flights
Dulles Intl to Bristol flights
Philadelphia to Liverpool flights
Dulles Intl to Liverpool flights
Dulles Intl to Leeds flights
Baltimore to Liverpool flights
Philadelphia to Southampton flights
Baltimore to Bristol flights
Philadelphia to Newcastle upon Tyne flights
Philadelphia to Bristol flights
Reagan-National to Leeds flights
Baltimore to Leeds flights
Baltimore to Southampton flights
Reagan-National to Bristol flights

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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest$369Average$520FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$474Average$605FlexibilityNo cancel feeOn-time76%
KLMCheapest$520Average$615FlexibilityNo cancel feeOn-time75%
Virgin AtlanticCheapest$562Average$793FlexibilityNo cancel feeOn-time72%
IberiaCheapest$581Average$759FlexibilityNo cancel feeOn-time77%
FinnairCheapest$585Average$737FlexibilityNo cancel feeOn-time76%
DeltaCheapest$609Average$882FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$622Average$828FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$628Average$830FlexibilityNo cancel feeOn-time70%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.