In terms of precipitation, rainfall in Islip ranges from 3.3 - 4.4 inches per month. March is typically the wettest month, when rainfall can reach 4.4 in. February is typically the driest time to visit Islip when rainfall is around 3.3 in.

If weather is an important factor for your trip to Islip, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

How far in advance should I book a flight from Oakland, California to Islip?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 50 days in advance, which can save you up to 83% on flights from Oakland, California to Islip compared to booking the week you need them. Waiting 50 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $443. For sooner than that we have options available in the next 3 days from $672.

What is the cheapest month to fly from Oakland, California to Islip?

The best pricing can be found in the month of February. Prices to Islip from Oakland, California average $395. You can even find prices in February for less than $395, as users have found deals to Islip from as low as $165. The month of December appears to be one of the more expensive times to travel to Islip from Oakland, California. Flying in the targeted month can save you up to 28%.

What is the cheapest time of day to fly from OAK to ISP?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Oakland, California to Islip as you normally would.

Can I find deals for flights from Oakland to Islip that include hotel bookings?

Yes. In addition to deals on Oakland to Islip flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Oakland to Islip?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Oakland to Islip.

Can I find deals for business class flights from Oakland to Islip?

Yes. Cheapflights offers flight deals from Oakland to Islip by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$200+ Flights from Oakland, CA to Islip

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Cheap flight deals from Oakland to Islip

Popular in	December
Cheapest in	February
Average price	$384

Highest demand for flights based on searches. 7% potential increase in price ($31 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in September 2025

Search Deals

Find flight deals from Oakland to Islip

Cheapest flights from Oakland to Islip
Explore the most affordable flight options available from Oakland to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

Fri 9/1210:00 amOAK - ISP

2 stops9h 55mSouthwest

Sat 9/1312:15 pmISP - OAK

2 stops12h 15mSouthwest

Deal found 9/9

$1,037

Thu 9/1111:01 amOAK - ISP

2 stops20h 57mMultiple Airlines

Fri 9/124:33 pmISP - OAK

2 stops24h 03mMultiple Airlines

Deal found 9/9

$1,281

Thu 9/112:30 pmOAK - ISP

2 stops17h 28mMultiple Airlines

Sat 9/1311:53 amISP - OAK

2 stops13h 10mMultiple Airlines

Deal found 9/9

$1,545

Last-minute flights from Oakland to Islip
Discover last-minute flight deals from Oakland to Islip. Data last updated September 11, 2025 and is based on user searches.

Thu 9/1111:01 amOAK - ISP

2 stops20h 57mMultiple Airlines

Fri 9/124:33 pmISP - OAK

2 stops24h 03mMultiple Airlines

Deal found 9/9

$1,281

Thu 9/112:30 pmOAK - ISP

2 stops17h 28mMultiple Airlines

Sat 9/1311:53 amISP - OAK

2 stops13h 10mMultiple Airlines

Deal found 9/9

$1,545

Fri 9/1210:00 amOAK - ISP

2 stops9h 55mSouthwest

Sat 9/1312:15 pmISP - OAK

2 stops12h 15mSouthwest

Deal found 9/9

$1,037

One-way flights from Oakland to Islip
Search for one-way flight options from Oakland to Islip. Find affordable one-way fares based on user searches. Data last updated September 11, 2025.

Wed 10/228:15 amOAK - ISP

2 stops10h 50mSouthwest

Deal found 9/9

$200

Thu 9/1811:01 amOAK - ISP

2 stops20h 39mMultiple Airlines

Deal found 9/10

$391

Mon 11/38:03 pmOAK - ISP

2 stops11h 55mMultiple Airlines

Deal found 9/11

$477

Mon 9/227:58 pmOAK - ISP

2 stops12h 00mMultiple Airlines

Deal found 9/11

$511

Fri 10/248:05 pmOAK - ISP

2 stops11h 53mMultiple Airlines

Deal found 9/10

$532

Mon 10/68:05 pmOAK - ISP

2 stops11h 53mMultiple Airlines

Deal found 9/10

$539

Fri 9/197:58 pmOAK - ISP

2 stops12h 00mMultiple Airlines

Deal found 9/9

$564

Tue 9/237:58 pmOAK - ISP

2 stops12h 00mMultiple Airlines

Deal found 9/11

$568

Sat 10/118:05 pmOAK - ISP

2 stops11h 53mMultiple Airlines

Deal found 9/9

$570

Tue 9/167:58 pmOAK - ISP

2 stops14h 26mMultiple Airlines

Deal found 9/9

$577

Wed 9/177:58 pmOAK - ISP

2 stops12h 00mMultiple Airlines

Deal found 9/9

$581

Fly from

Fly to

Route

Depart

Return

Price

OaklandIslip

OAK - ISP

OAKISP

Oakland

Wed 10/22

8:15 am-10:05 pm

2 stops10h 50m

$200

OaklandIslip

OAK - ISP

OAKISP

Oakland

Thu 9/18

11:01 am-10:40 am

2 stops20h 39m

$391

OaklandIslip

OAK - ISP

OAKISP

Oakland

Mon 11/3

8:03 pm-10:58 am

2 stops11h 55m

$477

OaklandIslip

OAK - ISP

OAKISP

Oakland

Mon 9/22

7:58 pm-10:58 am

2 stops12h 00m

$511

OaklandIslip

OAK - ISP

OAKISP

Oakland

Tue 10/7

8:05 pm-10:58 am

2 stops11h 53m

$539

OaklandIslip

OAK - ISP

OAKISP

Oakland

Sat 10/11

8:05 pm-10:58 am

2 stops11h 53m

$539

OaklandIslip

OAK - ISP

OAKISP

Oakland

Fri 10/17

8:05 pm-10:58 am

2 stops11h 53m

$539

OaklandIslip

OAK - ISP

OAKISP

Oakland

Thu 10/23

8:05 pm-10:58 am

2 stops11h 53m

$539

OaklandIslip

OAK - ISP

OAKISP

Oakland

Wed 10/22

8:05 pm-10:58 am

2 stops11h 53m

$539

OaklandIslip

OAK - ISP

OAKISP

Oakland

Mon 10/6

8:05 pm-10:58 am

2 stops11h 53m

$539

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 11 results

Best time to book a flight from Oakland to Islip

Have a flexible travel schedule? Discover the best time to fly to Islip from Oakland with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Oakland to Islip

What is the cheapest month to book a flight from Oakland, California to Islip?

Currently, January is the cheapest month in which you can book a flight from Oakland, California to Islip (average of $108). Flying from Oakland, California to Islip in November is currently the most expensive (average of $213). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Can I find deals for flights from Oakland to Islip that include hotel bookings?
Yes. In addition to deals on Oakland to Islip flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Oakland to Islip?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Oakland to Islip.
Can I find deals for business class flights from Oakland to Islip?
Yes. Cheapflights offers flight deals from Oakland to Islip by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Oakland, California to Islip?
Currently, January is the cheapest month in which you can book a flight from Oakland, California to Islip (average of $108). Flying from Oakland, California to Islip in November is currently the most expensive (average of $213). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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$200+ Cheap flights from Oakland, CA to Islip (OAK - ISP)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/22. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Oakland to Islip with Cheapflights

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2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Oakland to Islip

Popular in

Cheapest in

Average price

Find flight deals from Oakland to Islip

Cheapest flights from Oakland to IslipExplore the most affordable flight options available from Oakland to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

Explore the most affordable flight options available from Oakland to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Oakland to Islip that are best for you.

Best time to book a flight from Oakland to Islip

Have a flexible travel schedule? Discover the best time to fly to Islip from Oakland with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Oakland to Islip

What is the cheapest month to book a flight from Oakland, California to Islip?

Related info for your journey

Find useful and relevant information for your journey from Oakland to Islip. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

Can I find deals for flights from Oakland to Islip that include hotel bookings?

How can I find direct flights from Oakland to Islip?

Can I find deals for business class flights from Oakland to Islip?

What is the cheapest month to book a flight from Oakland, California to Islip?

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Cheapest flights from Oakland to Islip
Explore the most affordable flight options available from Oakland to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.