$129 Cheap Flights from Islip (ISP) to Baltimore (BWI)

View $129 flight on Tue, Nov 18, 2025Opens in a new window

Popular airlines from MacArthur Airport (ISP) to Baltimore Washington Intl. Airport (BWI)

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Cheap Flights from Islip to Baltimore (ISP-BWI)

Prices were available within the past 7 days and start at $129 for one-way flights and $257 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Southwest Airlines
Mon, Oct 20 - Tue, Oct 28
ISP
Islip
BWI
Baltimore
$257 Roundtrip, found 7 hours ago
$257
Roundtrip
found 7 hours ago
Select Southwest Airlines flight, departing Mon, Oct 20 from Islip to Baltimore, returning Tue, Oct 28, priced at $257 found 7 hours ago
Southwest Airlines
Mon, Oct 20 - Tue, Oct 28
ISP
Islip
BWI
Baltimore
$267 Roundtrip, found 7 hours ago
$267
Roundtrip
found 7 hours ago
Select Southwest Airlines flight, departing Mon, Oct 20 from Islip to Baltimore, returning Tue, Oct 28, priced at $267 found 7 hours ago
Southwest Airlines
Mon, Oct 20 - Fri, Oct 24
ISP
Islip
BWI
Baltimore
$275 Roundtrip, found 1 day ago
$275
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Mon, Oct 20 from Islip to Baltimore, returning Fri, Oct 24, priced at $275 found 1 day ago
Southwest Airlines
Tue, Oct 14 - Wed, Oct 15
ISP
Islip
BWI
Baltimore
$297 Roundtrip, found 1 day ago
$297
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Tue, Oct 14 from Islip to Baltimore, returning Wed, Oct 15, priced at $297 found 1 day ago
Southwest Airlines
Tue, Oct 14 - Wed, Oct 15
ISP
Islip
BWI
Baltimore
$306 Roundtrip, found 1 day ago
$306
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Tue, Oct 14 from Islip to Baltimore, returning Wed, Oct 15, priced at $306 found 1 day ago
Southwest Airlines
Mon, Oct 20 - Tue, Oct 28
ISP
Islip
BWI
Baltimore
$317 Roundtrip, found 7 hours ago
$317
Roundtrip
found 7 hours ago
Select Southwest Airlines flight, departing Mon, Oct 20 from Islip to Baltimore, returning Tue, Oct 28, priced at $317 found 7 hours ago
Southwest Airlines
Mon, Oct 20 - Tue, Oct 28
ISP
Islip
BWI
Baltimore
$327 Roundtrip, found 7 hours ago
$327
Roundtrip
found 7 hours ago
Select Southwest Airlines flight, departing Mon, Oct 20 from Islip to Baltimore, returning Tue, Oct 28, priced at $327 found 7 hours ago
Southwest Airlines
Thu, Nov 13 - Sun, Nov 16
ISP
Islip
BWI
Baltimore
$328 Roundtrip, found 14 hours ago
$328
Roundtrip
found 14 hours ago
Select Southwest Airlines flight, departing Thu, Nov 13 from Islip to Baltimore, returning Sun, Nov 16, priced at $328 found 14 hours ago
Southwest Airlines
Mon, Oct 20 - Fri, Oct 24
ISP
Islip
BWI
Baltimore
$335 Roundtrip, found 1 day ago
$335
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Mon, Oct 20 from Islip to Baltimore, returning Fri, Oct 24, priced at $335 found 1 day ago
Southwest Airlines
Fri, Jan 23 - Sun, Jan 25
ISP
Islip
BWI
Baltimore
$337 Roundtrip, found 1 day ago
$337
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Fri, Jan 23 from Islip to Baltimore, returning Sun, Jan 25, priced at $337 found 1 day ago

Frequently asked questions

How much does a flight from MacArthur Airport (ISP) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI) cost?
Snag a cheap one-way flight from $129 or cheap return flight from $257 from MacArthur Airport (ISP) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from MacArthur Airport (ISP) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI)?
Planning your trip for October is a great way to save, as it's the cheapest month for flights between ISP and BWI. You'll typically find the lowest fares during the off-season.
Which airlines fly direct from MacArthur Airport (ISP) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI)?
Fly directly from MacArthur Airport (ISP) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI) on a Southwest Airlines flight.
What is the cheapest airline that flies from MacArthur Airport (ISP) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI)?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll fly you from ISP to BWI. Then, sort your results by "Price (lowest to highest)" to snap up a good deal.
How many flights per day from MacArthur Airport (ISP) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI)?
Every day, an average of 2 direct flights operate from MacArthur Airport (ISP) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI). Choose the departure date that best fits your itinerary.
What are the most popular departure times for flights from MacArthur Airport (ISP) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI)?
More travelers fly between ISP and BWI at 3 PM than at any other point in the day. Rather skip the crowds? Pick a flight outside the busiest times and there's a chance you'll save on your fare as well.
What day of the week has the most flights from ISP to BWI?
Jet off on a Friday if you're searching for the best choice of flights from MacArthur Airport (ISP) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI).
What is the earliest flight from MacArthur Airport (ISP) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI)?
The first flight of the day jetting off from MacArthur Airport (ISP) is at around 5:35AM UTC-5. Hop on this flight and you'll reach Baltimore Washington Intl. Thurgood Marshall Airport (BWI) at approximately 6:55AM UTC-5. The overall travel time is 1h 20m.
How long does it take to fly from MacArthur Airport (ISP) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI)?
It usually takes 1 hour and 26 minutes to fly the 220 mi from ISP to BWI.
What is the best time to fly from MacArthur Airport (ISP) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI)?
Select a flight from MacArthur Airport (ISP) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI) that leaves before 3 PM to reduce the likelihood of delays and cancellations. Departures after this time are on average 22% more likely to be canceled.**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 Baltimore from MacArthur Airport (ISP)?
If you're taking a direct flight from MacArthur Airport (ISP) to Baltimore, Baltimore Washington Intl. Thurgood Marshall Airport (BWI) is the only airport you can touch down at.
Is it cheaper to buy a plane ticket from MacArthur Airport (ISP) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI) last-minute?
Holding off until just before your departure to book a flight from ISP to BWI often results in higher prices. While you might find some last-minute deals, they're not always guaranteed. Keep your travel plans flexible to boost your chances of getting a bargain.
Is it cheaper to book an ISP to BWI flight and hotel package?
Compared with arranging hotels and flights separately, booking an ISP to BWI flight and hotel package with Expedia could result in significant savings. Better still, having everything in one place will take the stress out of travel planning. Simply pick your flights and select from our wide range of stays, then personalize your trip with extras like tours and car rentals.
Can I cancel or change the date of my flight from MacArthur Airport (ISP) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI)?
It's generally possible to cancel or reschedule your ISP to BWI 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 possible and whether any costs are involved. You'll also find more information on our Customer Service portal.

Travel information

Travel information

Origin airport
MacArthur
Destination airport
Baltimore Washington Intl. Thurgood Marshall
Airlines serving
Southwest Airlines
Roundtrip price
$257
Distance
219 mi
Average flight time
1 hour 17 mins

Book with confidence

Book with confidence

Islip to Baltimore Flights

The cheapest times to fly from Islip to Baltimore

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 Islip to Baltimore are during the month of October. You can find some of the cheapest flights from Islip to Baltimore with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Islip to Baltimore

Sunday is one of the best days to book for cheap flights from Islip to Baltimore: 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 Islip to Baltimore

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 Islip to Baltimore in 2025. You can also book with separate airlines for your outbound and return journeys, from $129 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 Islip to Baltimore 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 Islip to Baltimore 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.

 

Islip to Baltimore Flights

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