$248 Cheap Flights from Baltimore (BWI) to London (LHR)

View $248 flight on Mon, Oct 13, 2025Opens in a new window

Popular airlines from Baltimore Washington Intl. Airport (BWI) to Heathrow Airport (LHR)

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Find available prices by choosing your travel dates.

Cheap Flights from Baltimore to London (BWI-LHR)

Prices were available within the past 7 days and start at $248 for one-way flights and $495 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Icelandair
Thu, Sep 25 - Sun, Oct 5
BWI
Baltimore
LHR
London
$495 Roundtrip, found 1 day ago
$495
Roundtrip
found 1 day ago
Select Icelandair flight, departing Thu, Sep 25 from Baltimore to London, returning Sun, Oct 5, priced at $495 found 1 day ago
Icelandair
Wed, Oct 29 - Wed, Nov 5
BWI
Baltimore
LHR
London
$513 Roundtrip, found 2 days ago
$513
Roundtrip
found 2 days ago
Select Icelandair flight, departing Wed, Oct 29 from Baltimore to London, returning Wed, Nov 5, priced at $513 found 2 days ago
Icelandair
Fri, Aug 1 - Mon, Aug 25
BWI
Baltimore
LHR
London
$527 Roundtrip, found 1 day ago
$527
Roundtrip
found 1 day ago
Select Icelandair flight, departing Fri, Aug 1 from Baltimore to London, returning Mon, Aug 25, priced at $527 found 1 day ago
British Airways
Mon, Aug 4 - Wed, Aug 20
BWI
Baltimore
LHR
London
$555 Roundtrip, found 9 hours ago
$555
Roundtrip
found 9 hours ago
Select British Airways flight, departing Mon, Aug 4 from Baltimore to London, returning Wed, Aug 20, priced at $555 found 9 hours ago
Iberia
Mon, Aug 4 - Wed, Aug 20
BWI
Baltimore
LHR
London
$555 Roundtrip, found 9 hours ago
$555
Roundtrip
found 9 hours ago
Select Iberia flight, departing Mon, Aug 4 from Baltimore to London, returning Wed, Aug 20, priced at $555 found 9 hours ago
Icelandair
Mon, Nov 24 - Sun, Nov 30
BWI
Baltimore
LHR
London
$559 Roundtrip, found 9 hours ago
$559
Roundtrip
found 9 hours ago
Select Icelandair flight, departing Mon, Nov 24 from Baltimore to London, returning Sun, Nov 30, priced at $559 found 9 hours ago
Icelandair
Mon, Jul 28 - Tue, Aug 12
BWI
Baltimore
LHR
London
$566 Roundtrip, found 1 day ago
$566
Roundtrip
found 1 day ago
Select Icelandair flight, departing Mon, Jul 28 from Baltimore to London, returning Tue, Aug 12, priced at $566 found 1 day ago
Icelandair
Tue, Aug 5 - Sun, Aug 17
BWI
Baltimore
LHR
London
$590 Roundtrip, found 9 hours ago
$590
Roundtrip
found 9 hours ago
Select Icelandair flight, departing Tue, Aug 5 from Baltimore to London, returning Sun, Aug 17, priced at $590 found 9 hours ago
American Airlines
Wed, Oct 29 - Wed, Nov 5
BWI
Baltimore
LHR
London
$599 Roundtrip, found 2 days ago
$599
Roundtrip
found 2 days ago
Select American Airlines flight, departing Wed, Oct 29 from Baltimore to London, returning Wed, Nov 5, priced at $599 found 2 days ago
Delta
Thu, Mar 12 - Tue, Mar 17
BWI
Baltimore
LHR
London
$619 Roundtrip, found 1 day ago
$619
Roundtrip
found 1 day ago
Select Delta flight, departing Thu, Mar 12 from Baltimore to London, returning Tue, Mar 17, priced at $619 found 1 day ago
Flights from Baltimore (BWI) to London (LHR)
Origin airport
Baltimore Washington Intl. Thurgood Marshall
Destination airport
Heathrow
Airlines serving
Aer Lingus, Air France, American Airlines, British Airways, Delta, Finnair, Iberia, Icelandair, KLM, Scandinavian Airlines, United, Virgin Atlantic
Roundtrip price
$495
Distance
3624 mi

Baltimore to London Flights

The cheapest times to fly from Baltimore to London

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Baltimore to London are during the month of September. You can find some of the cheapest flights from Baltimore to London with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Baltimore to London

Sunday is one of the best days to book for cheap flights from Baltimore to London: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

How to find cheap round-trip tickets from Baltimore to London

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Baltimore to London in 2025. You can also book with separate airlines for your outbound and return journeys, from $248 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Baltimore to London flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

You could also save big by booking one of Expedia's vacation packages. Bundling together your Baltimore to London airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

*Terms apply.

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

Frequently asked questions

How much does a flight from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Heathrow Airport (LHR) cost?
Cheap round-trip flights from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Heathrow Airport (LHR) start at $673. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a American Airlines flight leaving BWI on May 12 2025 and touching down at LHR. The price was last updated on April 23 2025 and has not changed since.
What is the cheapest month to fly from BWI to LHR?
The cheapest flights from BWI to LHR are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Heathrow Airport (LHR)?
When heading out of Baltimore Washington Intl. Thurgood Marshall Airport (BWI), you can get on a direct flight to Heathrow Airport (LHR) with British Airways.
What is the cheapest airline that flies from BWI to LHR?
With fares starting at $404 for a one-way flight from BWI to LHR, Iberia is currently the cheapest carrier on this route. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from BWI on May 13 2025. Prices were last updated on April 23 2025 and have not changed since.
How many flights per day from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Heathrow Airport (LHR)?
On average, Baltimore Washington Intl. Thurgood Marshall Airport (BWI) has 6 direct flights to Heathrow Airport (LHR) each week. For more options, use Expedia’s filter tool to find flights with a layover. Squeeze in a quick visit to another location or just break up your journey.
What are the most popular departure times for flights from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Heathrow Airport (LHR)?
The 8 PM departures from BWI to LHR see the highest demand. They can also be more expensive. If you’re looking to save, pick a less crowded time to fly.
What day of the week has the most flights from BWI to LHR?
Depart on a Friday if you’re after the largest selection of flights from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Heathrow Airport (LHR).
What is the earliest flight from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Heathrow Airport (LHR)?
Hop on the earliest flight at around 8:30PM UTC-5, leaving from Baltimore Washington Intl. Thurgood Marshall Airport (BWI). You’ll be in the air for about 7h 10m, coming in to land at Heathrow Airport (LHR) at approximately 8:40AM UTC+0.
How long does it take to fly from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Heathrow Airport (LHR)?
It takes about 7 hours and 10 minutes to fly the 3,600 mi from BWI to LHR.
What is the best time to fly from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Heathrow Airport (LHR)?
To avoid possible delays on the Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Heathrow Airport (LHR) route, aim to travel before 3 PM. Later flights have a 22% higher chance of cancellation.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
What airports do you fly into for London from Baltimore Washington Intl. Thurgood Marshall Airport (BWI)?
Browse your flight options from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Heathrow Airport (LHR). This is the only London airport you can fly into if you’re taking a direct flight.
Is it cheaper to buy a plane ticket from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Heathrow Airport (LHR) last-minute?
Last-minute fares from BWI to LHR are generally more expensive. For the best prices, start looking for flights well in advance. That being said, if you’re flexible with your travel dates, you may score a cheap ticket right before your journey.
Is it cheaper to book a BWI to LHR flight and hotel package?
You’ll typically save money by securing a BWI to LHR flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it’s simple to manage it all in one place. After choosing your ideal accommodations and flights, you can add extras like tours, car rentals and activities.
Can I cancel or change the date of my flight from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Heathrow Airport (LHR)?
You can usually reschedule or cancel your BWI to LHR flight. However, for bookings made more than 24 hours ago, additional charges may apply. Check your airline’s policies in your itinerary to see what changes are allowed and if any costs are involved. You’ll also find more information on our Customer Service portal.

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*Available to One Key members.