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Cheap flights from Portsmouth to Baltimore from £441

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 23/11. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BWI
3 Sep — 10 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Portsmouth to Baltimore

Enter your travel dates to find the best prices.

Cheapest flights from Portsmouth to Baltimore
Explore the most affordable flight options available from Portsmouth to Baltimore. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 August 2026.

Mon 14/909:05 -
2 stops18h 05m
Mon 21/917:40 -
2 stops18h 10m
Deal found 31/7£647
Thu 29/1008:40 -
2 stops18h 24m
Thu 5/1106:10 -
2 stops21h 00m
Deal found 30/7£653
Mon 14/909:05 -
2 stops18h 05m
Mon 21/918:35 -
2 stops17h 15m
Deal found 31/7£657
Wed 19/809:15 -
2 stops16h 58m
Wed 30/909:20 -
2 stops18h 15m
Deal found 1/8£734
Thu 8/1008:55 -
2 stops15h 40m
Tue 13/1021:30 -
2 stops15h 15m
Deal found 3/8£846
Fri 2/1019:55 -
2 stops28h 45m
Tue 6/1021:30 -
2 stops16h 55m
Deal found 30/7£940

Find flight deals from Portsmouth to Baltimore

Keep the following information in mind while searching for Portsmouth to Baltimore flight deals. Data was last updated 4 August 2026.

Round-trip from

£647

One-way from

£441

Popular in

June

Cheapest in

February

Average price

£553
KLM
  • KLM
  • 14/9-21/9
  • 4 total stops
  • 36h 15m total
  • Portsmouth to Baltimore
Search Deals
23/11
  • 23/11
  • 2 total stops
  • 26h 05m total
  • Portsmouth to Baltimore
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£38 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£5 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Portsmouth to Baltimore 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 858,174 searches. Data last updated 4 August 2026.
Use the filters below to find and compare flights from Portsmouth to Baltimore that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Thu 29/10

08:40-23:04

2 stops18h 24m

Baltimore/Washington

Thu 5/11

06:10-08:10

2 stops21h 00m

£653

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Mon 14/9

09:05-22:10

2 stops18h 05m

Baltimore/Washington

Mon 21/9

18:35-16:50

2 stops17h 15m

£657

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Wed 19/8

09:15-21:13

2 stops16h 58m

Baltimore/Washington

Wed 30/9

09:20-08:35

2 stops18h 15m

£734
Fastest return journey

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Thu 8/10

08:55-19:35

2 stops15h 40m

Baltimore/Washington

Tue 13/10

21:30-17:45

2 stops15h 15m

£846

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Fri 2/10

19:55-19:40

2 stops28h 45m

Baltimore/Washington

Tue 6/10

21:30-19:25

2 stops16h 55m

£940
Cheapest one-way

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Mon 23/11

20:00-17:05

2 stops26h 05m

£466

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Wed 19/8

06:45-22:15

2 stops44h 30m

£716

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Fri 28/8

19:55-17:15

2 stops26h 20m

£900
Fastest single journey

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Sat 22/8

06:45-17:15

2 stops15h 30m

£1,119

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Sun 23/8

14:35-19:40

2 stops34h 05m

£1,123

Flights are sorted by cheapest return flights first.

Deals found on 3/8

Showing 1-10 of 13 resultsSorted by cheapest first
1
2

Best time to book a flight from Portsmouth to Baltimore

Have a flexible travel schedule? Discover the best time to fly to Baltimore from Portsmouth with our price prediction graph.
Estimated return 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 Portsmouth to Baltimore

What is the cheapest time of day to fly from P0R to BWI?

Find hourly flight availability from Portsmouth to Baltimore. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 4 August 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Portsmouth to Baltimore as you normally would.

Related info for your journey

Find useful and relevant information for your journey from Portsmouth to Baltimore. 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 into for flights to Baltimore from Portsmouth?

    For a flight from Portsmouth to Baltimore, you will be flying into Baltimore/Washington. Baltimore/Washington (BWI) is just 8.5 mi from the center of the city. Baltimore/Washington is the only Baltimore airport and it handles 0 inbound flights from Portsmouth per day. 10 airlines have flights to Baltimore/Washington from Portsmouth on a regular basis.

  • How long is the flight from Portsmouth to Baltimore?

    A quick flight from Portsmouth to Baltimore can take about 18h 24m. Delta provides one of the quickest options available for as low as £653. The distance between Portsmouth and Baltimore is about 3597 mi.

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

    No one likes to see their flight delayed. When booking a flight from Portsmouth to Baltimore consider choosing American Airlines (68%), Aer Lingus (68%) or Finnair (68%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Portsmouth to Baltimore?

    Looking at all options, your cheapest flight can be booked for £361. While the most popular route (Southampton Eastleigh - Baltimore/Washington) can be booked for £661 on average, our data indicates £956 when flying from Portsmouth to Baltimore.

  • Can I find deals for flights from Portsmouth to Baltimore that include hotel bookings?

    Yes. In addition to deals on Portsmouth to Baltimore flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Portsmouth to Baltimore?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portsmouth to Baltimore.

  • Can I find deals for business class flights from Portsmouth to Baltimore?

    Yes. Cheapflights offers flight deals from Portsmouth to Baltimore 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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Alternative routes for Portsmouth to Baltimore

See prices for flight routes from nearby airports that may be better suited for you.
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Southampton to Reagan-National flights
Bristol to Reagan-National flights
Exeter to Dulles Intl flights
Norwich to Baltimore flights
Bristol to Baltimore flights
Newquay to Philadelphia flights
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Top 10 airlines flying from Portsmouth to Baltimore

Discover the top 10 airlines that operate flights from Portsmouth to Baltimore. 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 858,174 searches. Data last updated 4 August 2026.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£332Average£501FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
KLMCheapest£380Average£548FlexibilityNo cancel feeOn-time75%
Search KLM flights
IcelandairCheapest£384Average£521FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
United AirlinesCheapest£405Average£480FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
British AirwaysCheapest£439Average£600FlexibilityNo cancel feeOn-time70%
Search British Airways flights
DeltaCheapest£441Average£612FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
American AirlinesCheapest£499Average£724FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Aer LingusCheapest£515Average£620FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
FinnairCheapest£521Average£617FlexibilityNo cancel feeOn-time76%
Search Finnair flights
IberiaCheapest£532Average£733FlexibilityNo cancel feeOn-time77%
Search Iberia flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Portsmouth to Baltimore?

Deals for Portsmouth to Baltimore flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Portsmouth to Baltimore?

Millions of users choose and trust Cheapflights to book the best flight deals from Portsmouth to Baltimore for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Portsmouth to Baltimore with no change fees?

Yes! Cheapflights helps users easily find flights from Portsmouth to Baltimore with no change fees.

Can Cheapflights notify me if prices for flights from Portsmouth to Baltimore become cheaper?

Not ready to book yet? You can track prices for flights from Portsmouth to Baltimore on Cheapflights with our Price Alert feature and get notified when better prices are available.

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