$584 Cheap Flights from Redmond (RDM) to Islip (ISP)

View $584 flight on Thu, Jul 23, 2026Opens in a new window

Popular airlines from Redmond Municipal Airport (RDM) to MacArthur Airport (ISP)

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Cheap Flights from Redmond to Islip (RDM-ISP)

Prices were available within the past 7 days and start at $584 for one-way flights and $1,726 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Mon, Mar 16 - Fri, Mar 20
RDM
Redmond
ISP
Islip
$1,726 Roundtrip, found 4 hours ago
$1,726
Roundtrip
found 4 hours ago
Select Alaska Airlines flight, departing Mon, Mar 16 from Redmond to Islip, returning Fri, Mar 20, priced at $1,726 found 4 hours ago
Alaska Airlines
Mon, Mar 16 - Fri, Mar 20
RDM
Redmond
ISP
Islip
$1,776 Roundtrip, found 4 hours ago
$1,776
Roundtrip
found 4 hours ago
Select Alaska Airlines flight, departing Mon, Mar 16 from Redmond to Islip, returning Fri, Mar 20, priced at $1,776 found 4 hours ago
Alaska Airlines
Fri, Mar 13 - Tue, Mar 17
RDM
Redmond
ISP
Islip
$1,862 Roundtrip, found 3 days ago
$1,862
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Fri, Mar 13 from Redmond to Islip, returning Tue, Mar 17, priced at $1,862 found 3 days ago

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Frequently asked questions

How much does a flight from Robert's Field Airport (RDM) to MacArthur Airport (ISP) cost?
Secure a cheap one-way flight from $584 or cheap return flight from $1,726 from Robert's Field Airport (RDM) to MacArthur Airport (ISP) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Robert's Field Airport (RDM) to MacArthur Airport (ISP)?
The cheapest month to fly from RDM to ISP is March, when demand is low. Off-peak months are usually when you'll find cheap fares for travel between these airports.
What is the cheapest airline that flies from Robert's Field Airport (RDM) to MacArthur Airport (ISP)?
To find the cheapest airline flying from RDM to ISP, use Expedia's filter tool. Customize your search based on your travel needs, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to see the cheapest fares upfront.
How many flights per day from Robert's Field Airport (RDM) to MacArthur Airport (ISP)?
There aren't any daily direct flights departing from Robert's Field Airport (RDM) to MacArthur Airport (ISP). But you can choose flights with layovers. Filter your search on Expedia to include one or two stops, and you'll be on your way in no time at all.
What day of the week has the most flights from RDM to ISP?
Friday is typically the busiest day for flights, while Tuesday tends to be the quietest.* Remember that flight schedules can vary based on a number of factors, such as the carrier and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Robert's Field Airport (RDM) to MacArthur Airport (ISP)?
To avoid possible delays on the Robert's Field Airport (RDM) to MacArthur Airport (ISP) route, aim to fly before 3 PM. Later departures are 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.
Is it cheaper to buy a plane ticket from Robert's Field Airport (RDM) to MacArthur Airport (ISP) last-minute?
Last-minute bookings from RDM to ISP are usually more expensive. For the best rates, start searching for flights as early as possible. That said, if you're flexible with your travel plans, it's possible to find a cheap ticket right before your journey.
Is it cheaper to book a RDM to ISP flight and hotel package?
Compared with arranging hotels and flights separately, booking a RDM to ISP flight and hotel package with Expedia could result in significant savings. Better still, having everything in one convenient place takes the hassle out of planning your trip. Just secure your flights and choose from our extensive range of hotels, then customize your trip with extras like tours and car rentals.
Can I cancel or change the date of my flight from Robert's Field Airport (RDM) to MacArthur Airport (ISP)?
It's generally possible to reschedule or cancel your RDM to ISP flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find further details on our Customer Service portal.

Travel information

Origin airport
Robert's Field
Destination airport
MacArthur
Roundtrip price
$1,725
Distance
2423 mi

Book with confidence

Redmond to Islip Flights

The cheapest times to fly from Redmond 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 Redmond to Islip are during the month of March. You can find some of the cheapest flights from Redmond to Islip with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Redmond to Islip

Sunday is one of the best days to book for cheap flights from Redmond 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 Redmond 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 Redmond to Islip in 2026. You can also book with separate airlines for your outbound and return journeys, from $584 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 Redmond 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 Redmond 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.

 

Redmond to Islip Flights

*Flight schedules are subject to change.

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*Available to One Key members.