$128 Cheap Flights from Baltimore (BWI) to Islip (ISP)

View $128 flight on Tue, Dec 9, 2025Opens in a new window

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

Cheap Flights from Baltimore to Islip (BWI-ISP)

Prices were available within the past 7 days and start at $128 for one-way flights and $276 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Southwest Airlines
Wed, Jan 14 - Fri, Jan 16
BWI
Baltimore
ISP
Islip
$276 Roundtrip, found 11 hours ago
$276
Roundtrip
found 11 hours ago
Select Southwest Airlines flight, departing Wed, Jan 14 from Baltimore to Islip, returning Fri, Jan 16, priced at $276 found 11 hours ago
Southwest Airlines
Fri, Dec 19 - Tue, Jan 6
BWI
Baltimore
ISP
Islip
$278 Roundtrip, found 5 days ago
$278
Roundtrip
found 5 days ago
Select Southwest Airlines flight, departing Fri, Dec 19 from Baltimore to Islip, returning Tue, Jan 6, priced at $278 found 5 days ago
Southwest Airlines
Sun, Dec 14 - Mon, Jan 5
BWI
Baltimore
ISP
Islip
$293 Roundtrip, found 5 days ago
$293
Roundtrip
found 5 days ago
Select Southwest Airlines flight, departing Sun, Dec 14 from Baltimore to Islip, returning Mon, Jan 5, priced at $293 found 5 days ago
Southwest Airlines
Fri, Dec 19 - Tue, Jan 6
BWI
Baltimore
ISP
Islip
$300 Roundtrip, found 5 days ago
$300
Roundtrip
found 5 days ago
Select Southwest Airlines flight, departing Fri, Dec 19 from Baltimore to Islip, returning Tue, Jan 6, priced at $300 found 5 days ago
Southwest Airlines
Sun, Dec 14 - Mon, Jan 5
BWI
Baltimore
ISP
Islip
$304 Roundtrip, found 5 days ago
$304
Roundtrip
found 5 days ago
Select Southwest Airlines flight, departing Sun, Dec 14 from Baltimore to Islip, returning Mon, Jan 5, priced at $304 found 5 days ago
Southwest Airlines
Fri, Dec 19 - Tue, Jan 6
BWI
Baltimore
ISP
Islip
$311 Roundtrip, found 5 days ago
$311
Roundtrip
found 5 days ago
Select Southwest Airlines flight, departing Fri, Dec 19 from Baltimore to Islip, returning Tue, Jan 6, priced at $311 found 5 days ago
Southwest Airlines
Tue, Dec 23 - Fri, Dec 26
BWI
Baltimore
ISP
Islip
$320 Roundtrip, found 5 days ago
$320
Roundtrip
found 5 days ago
Select Southwest Airlines flight, departing Tue, Dec 23 from Baltimore to Islip, returning Fri, Dec 26, priced at $320 found 5 days ago
Southwest Airlines
Fri, Dec 12 - Sat, Dec 13
BWI
Baltimore
ISP
Islip
$322 Roundtrip, found 6 days ago
$322
Roundtrip
found 6 days ago
Select Southwest Airlines flight, departing Fri, Dec 12 from Baltimore to Islip, returning Sat, Dec 13, priced at $322 found 6 days ago
Southwest Airlines
Tue, Dec 9 - Sun, Dec 14
BWI
Baltimore
ISP
Islip
$327 Roundtrip, found 8 hours ago
$327
Roundtrip
found 8 hours ago
Select Southwest Airlines flight, departing Tue, Dec 9 from Baltimore to Islip, returning Sun, Dec 14, priced at $327 found 8 hours ago
Southwest Airlines
Wed, Nov 5 - Wed, Nov 12
BWI
Baltimore
ISP
Islip
$332 Roundtrip, found 6 days ago
$332
Roundtrip
found 6 days ago
Select Southwest Airlines flight, departing Wed, Nov 5 from Baltimore to Islip, returning Wed, Nov 12, priced at $332 found 6 days ago

Find the cheapest month to fly from Baltimore (BWI) to Islip (ISP)

January is typically the cheapest month to fly

From $119 - $693 per traveler.

Alternative airports near Islip

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to MacArthur ISP. Cheapest and Closest option available. Average driving time to city center is 14 minutes. Flights from $952
ISP
MacArthur
CheapestClosest
Average driving time to city center14 min
Flights from $952
Flights from Baltimore (BWI) to Islip (ISP)
Origin airport
Baltimore Washington Intl. Thurgood Marshall
Destination airport
MacArthur
Airlines serving
Southwest Airlines
Roundtrip price
$276
Distance
219 mi
Average flight time
1 hour 8 mins

Baltimore to Islip Flights

The cheapest times to fly from Baltimore to Islip

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

 

The best time to book a flight from Baltimore to Islip

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

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 Islip in 2025. You can also book with separate airlines for your outbound and return journeys, from $128 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 Islip 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 Islip 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 MacArthur Airport (ISP) cost?
Snag a cheap one-way flight from $128 or cheap return flight from $276 from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to MacArthur Airport (ISP) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to MacArthur Airport (ISP)?
January is the cheapest month to fly from BWI to ISP. Timing your trip outside of the busy season is often the key to scoring lower fares.
Which airlines fly direct from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to MacArthur Airport (ISP)?
When departing from Baltimore Washington Intl. Thurgood Marshall Airport (BWI), you can jump on a direct flight to MacArthur Airport (ISP) with Southwest Airlines.
What is the cheapest airline that flies from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to MacArthur Airport (ISP)?
To find the cheapest airline that'll fly you from BWI to ISP, use Expedia's filter tool. Customize your search based on what matters most to you, such as preferred carriers and flight duration. You can then sort your results by "Price (lowest to highest)" to see the cheapest fares upfront.
How many flights per day from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to MacArthur Airport (ISP)?
With an average of 2 direct flights that operate from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to MacArthur Airport (ISP) daily, you'll be up in the air in no time.
What are the most popular departure times for flights from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to MacArthur Airport (ISP)?
The 9 PM departures from BWI to ISP are typically the busiest. They can also be more expensive. If you want to save on your trip, book during off-peak hours.
What day of the week has the most flights from BWI to ISP?
Jet off on a Friday if you're looking for the largest selection of flights from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to MacArthur Airport (ISP).
What is the earliest flight from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to MacArthur Airport (ISP)?
Baltimore Washington Intl. Thurgood Marshall Airport (BWI)'s first flight to MacArthur Airport (ISP) departs at approximately 9:40AM UTC-5. With a travel time of 1h 10m, you'll land at around 10:50AM UTC-5.
How long does it take to fly from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to MacArthur Airport (ISP)?
Flights from BWI to ISP have an average travel time of 1 hour and 10 minutes. The distance between the two airports is 220 mi.
What is the best time to fly from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to MacArthur Airport (ISP)?
To arrive at MacArthur Airport (ISP) on schedule, pick a flight that takes off from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**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 Islip from Baltimore Washington Intl. Thurgood Marshall Airport (BWI)?
MacArthur Airport (ISP) is the only airport in Islip with direct flights from Baltimore Washington Intl. Thurgood Marshall Airport (BWI). Browse the available options and find affordable fares on Expedia.
Is it cheaper to buy a plane ticket from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to MacArthur Airport (ISP) last-minute?
Last-minute fares from BWI to ISP are generally more expensive. For the lowest rates, start searching for flights ahead of time. 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 ISP flight and hotel package?
Compared with arranging hotels and flights separately, booking a BWI to ISP flight and hotel package with Expedia could result in significant savings. Better still, having it all in one place takes the hassle out of planning your trip. Just pick your flights and select from our extensive range of hotels, then customize your trip with other add-ons like activities and car rentals.
Can I cancel or change the date of my flight from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to MacArthur Airport (ISP)?
If you booked your BWI to ISP flight in the last 24 hours, you may be able to cancel or modify it at no cost. Depending on the airline and the fare type you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for more details.

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*Available to One Key members.