HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Portsmouth

$687+ Cheap flights from Baltimore (BWI) to Portsmouth, England

BWI — LHR
Sep 25 — Oct 21
Fri 9/25
Fri 10/2
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

Cheapest flights from Baltimore to Portsmouth

Wed 12/26:32 pm -
2 stops17h 28m
Mon 12/75:30 pm -
2 stops35h 05m
Deal found 8/24$1,119
Wed 10/77:50 pm -
2 stops16h 00m
Wed 10/149:15 am -
2 stops18h 43m
Deal found 8/23$1,132
Sat 10/108:30 pm -
2 stops15h 20m
Sat 10/177:50 am -
2 stops40h 55m
Deal found 8/25$1,149
Fri 10/91:55 pm -
2 stops21h 55m
Fri 10/169:05 am -
2 stops18h 53m
Deal found 8/25$1,301
Sat 8/291:00 pm -
2 stops14h 45m
Mon 9/79:05 am -
2 stops19h 13m
Deal found 8/22$1,423
Fri 10/912:21 pm -
3 stops26h 09m
Fri 10/166:50 am -
2 stops41h 50m
Deal found 8/25$1,519
Sat 8/291:00 pm -
2 stops14h 45m
Mon 9/79:05 am -
2 stops18h 34m
Deal found 8/24$1,725

Find flight deals from Baltimore to Portsmouth

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,119
(Delta)

One-way from

$687
(Delta)

Popular in

June

Cheapest in

January

Average price

$909
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. 19% potential increase in price ($206 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($35 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

Cheapflights Fare Finder

 
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 Baltimore/Washington - SOU Southampton Eastleigh

BWISOU

Baltimore/Washington

Wed 12/2

6:32 pm-5:00 pm

2 stops17h 28m

Southampton Eastleigh

Mon 12/7

5:30 pm-11:35 pm

2 stops35h 05m

$1,119
Quickest round-trip

BaltimoreSouthampton

BWI Baltimore/Washington - SOU Southampton Eastleigh

BWISOU

Baltimore/Washington

Wed 10/7

7:50 pm-4:50 pm

2 stops16h 00m

Southampton Eastleigh

Wed 10/14

9:15 am-10:58 pm

2 stops18h 43m

$1,132

BaltimoreSouthampton

BWI Baltimore/Washington - SOU Southampton Eastleigh

BWISOU

Baltimore/Washington

Sat 10/10

8:30 pm-4:50 pm

2 stops15h 20m

Southampton Eastleigh

Sat 10/17

7:50 am-7:45 pm

2 stops40h 55m

$1,149

BaltimoreSouthampton

BWI Baltimore/Washington - SOU Southampton Eastleigh

BWISOU

Baltimore/Washington

Fri 10/9

1:55 pm-4:50 pm

2 stops21h 55m

Southampton Eastleigh

Fri 10/16

9:05 am-10:58 pm

2 stops18h 53m

$1,301

BaltimoreSouthampton

BWI Baltimore/Washington - SOU Southampton Eastleigh

BWISOU

Baltimore/Washington

Fri 10/9

12:21 pm-7:30 pm

3 stops26h 09m

Southampton Eastleigh

Fri 10/16

7:30 pm-10:15 pm

3 stops31h 45m

$1,713

BaltimoreSouthampton

BWI Baltimore/Washington - SOU Southampton Eastleigh

BWISOU

Baltimore/Washington

Sun 1/10

6:55 pm-9:45 am

2 stops33h 50m

Southampton Eastleigh

Thu 1/14

8:55 am-5:05 pm

2 stops37h 10m

$4,994
Cheapest one-way

BaltimoreSouthampton

BWI Baltimore/Washington - SOU Southampton Eastleigh

BWISOU

Baltimore/Washington

Sat 9/5

11:03 am-8:45 am

2 stops16h 42m

$687
Quickest one-way

BaltimoreSouthampton

BWI Baltimore/Washington - SOU Southampton Eastleigh

BWISOU

Baltimore/Washington

Sat 9/12

2:03 pm-8:45 am

2 stops13h 42m

$687

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/22

Sorted by cheapest first

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

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?

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

  • 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. 7 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 $1,177, Delta can have you in Portsmouth from Baltimore in 15h 05m. There are 3597 mi between Baltimore and Portsmouth. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    Consider Aer Lingus (62%), Finnair (62%) or Iberia (62%) 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 $324. On average you can expect to pay $2,054. The most popular route, (Baltimore/Washington - Southampton Eastleigh), can usually be booked for $1,119.

  • 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

Browse thousands of different options on Cheapflights for your next trip

Top 7 airlines flying from Baltimore to Portsmouth

AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$462Average$886FlexibilityNo cancel feeOn-time69%
IcelandairCheapest$465Average$729FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$594Average$926FlexibilityNo cancel feeOn-time70%
FinnairCheapest$599Average$827FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$624Average$929FlexibilityNo cancel feeOn-time71%
DeltaCheapest$629Average$880FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$650Average$939FlexibilityNo cancel feeOn-time77%

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.