$69 Cheap Flights from Baltimore (BWI) to Islip (ISP)

View $69 flight on Wed, Aug 13, 2025Opens in a new window

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

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Cheap Flights from Baltimore to Islip (BWI-ISP)

Prices were available within the past 7 days and start at $69 for one-way flights and $144 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Southwest Airlines
Wed, Oct 8 - Sat, Oct 11
BWI
Baltimore
ISP
Islip
$144 Roundtrip, found 4 hours ago
$144
Roundtrip
found 4 hours ago
Select Southwest Airlines flight, departing Wed, Oct 8 from Baltimore to Islip, returning Sat, Oct 11, priced at $144 found 4 hours ago
Southwest Airlines
Thu, Nov 13 - Tue, Nov 18
BWI
Baltimore
ISP
Islip
$151 Roundtrip, found 3 hours ago
$151
Roundtrip
found 3 hours ago
Select Southwest Airlines flight, departing Thu, Nov 13 from Baltimore to Islip, returning Tue, Nov 18, priced at $151 found 3 hours ago
Southwest Airlines
Thu, Sep 11 - Fri, Sep 12
BWI
Baltimore
ISP
Islip
$181 Roundtrip, found 1 day ago
$181
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Thu, Sep 11 from Baltimore to Islip, returning Fri, Sep 12, priced at $181 found 1 day ago
Southwest Airlines
Thu, Sep 11 - Fri, Sep 12
BWI
Baltimore
ISP
Islip
$188 Roundtrip, found 1 day ago
$188
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Thu, Sep 11 from Baltimore to Islip, returning Fri, Sep 12, priced at $188 found 1 day ago
Southwest Airlines
Wed, Oct 8 - Sat, Oct 11
BWI
Baltimore
ISP
Islip
$204 Roundtrip, found 4 hours ago
$204
Roundtrip
found 4 hours ago
Select Southwest Airlines flight, departing Wed, Oct 8 from Baltimore to Islip, returning Sat, Oct 11, priced at $204 found 4 hours ago
Frontier Airlines
Thu, Aug 7 - Tue, Aug 12
BWI
Baltimore
ISP
Islip
$208 Roundtrip, found 11 hours ago
$208
Roundtrip
found 11 hours ago
Select Frontier Airlines flight, departing Thu, Aug 7 from Baltimore to Islip, returning Tue, Aug 12, priced at $208 found 11 hours ago
Frontier Airlines
Tue, Oct 7 - Mon, Oct 20
BWI
Baltimore
ISP
Islip
$209 Roundtrip, found 23 hours ago
$209
Roundtrip
found 23 hours ago
Select Frontier Airlines flight, departing Tue, Oct 7 from Baltimore to Islip, returning Mon, Oct 20, priced at $209 found 23 hours ago
Southwest Airlines
Thu, Nov 13 - Tue, Nov 18
BWI
Baltimore
ISP
Islip
$211 Roundtrip, found 3 hours ago
$211
Roundtrip
found 3 hours ago
Select Southwest Airlines flight, departing Thu, Nov 13 from Baltimore to Islip, returning Tue, Nov 18, priced at $211 found 3 hours ago
Southwest Airlines
Wed, Oct 8 - Sat, Oct 11
BWI
Baltimore
ISP
Islip
$213 Roundtrip, found 4 hours ago
$213
Roundtrip
found 4 hours ago
Select Southwest Airlines flight, departing Wed, Oct 8 from Baltimore to Islip, returning Sat, Oct 11, priced at $213 found 4 hours ago
Southwest Airlines
Sat, Aug 9 - Mon, Aug 11
BWI
Baltimore
ISP
Islip
$215 Roundtrip, found 1 day ago
$215
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Sat, Aug 9 from Baltimore to Islip, returning Mon, Aug 11, priced at $215 found 1 day 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.

Graph displaying average flight prices per month

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 $282
ISP
MacArthur
CheapestClosest
Average driving time to city center14 min
Flights from $282
Flights from Baltimore (BWI) to Islip (ISP)
Origin airport
Baltimore Washington Intl. Thurgood Marshall
Destination airport
MacArthur
Airlines serving
Frontier Airlines, Southwest Airlines
Roundtrip price
$144
Distance
219 mi
Average flight time
1 hour 10 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 October. 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 $69 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?
Cheap round-trip flights from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to MacArthur Airport (ISP) start from $229. 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 Southwest Airlines flight leaving BWI on July 26 2025 and touching down at ISP. The price was last updated on June 30 2025 and has not changed since.
What is the cheapest month to fly from BWI to ISP?
Look for direct flights from BWI to ISP in November to score cheaper tickets. You can find a one-way Southwest Airlines flight for $131 leaving on November 6 2025. This price is based on the cheapest direct flight found on Expedia for this route in the next 330 days. The price was last updated on June 30 2025 and remains unchanged.
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 BWI to ISP?
With tickets starting at $160 for a one-way flight from BWI to ISP, Southwest Airlines is currently the cheapest carrier for 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 August 24 2025. Prices were last updated on June 30 2025 and have not changed since.
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.