In terms of precipitation, rainfall in Islip, New York 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, New York when rainfall is around 3.3 in.

If weather is an important factor for your trip to Islip, New York, 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, New York?

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 86% on flights from Oakland, California to Islip, New York 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 $655.

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

The best pricing can be found in the month of February. Prices to Islip, New York from Oakland, California average $399. You can even find prices in February for less than $399, as users have found deals to Islip, New York from as low as $165. The month of December appears to be one of the more expensive times to travel to Islip, New York from Oakland, California. Flying in the targeted month can save you up to 27%.

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, New York 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.

$219+ Flights from Oakland, CA to Islip, NY

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Cheap flight deals from Oakland to Islip

Round-trip from	$472 (Southwest)
One-way from	$219 (Southwest)
Popular in	December
Cheapest in	February
Average price	$437

From Oakland to Islip Long Island

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One-way flight from Oakland to Islip Long Island

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Highest demand for flights based on searches. 6% potential increase in price ($29 potential increase over avg. RT price).

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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).

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Average for round-trip flights in July 2025

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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 julio 29, 2025.

mar. 8/267:00 amOAK - ISP

2 stops12h 05mSouthwest

dom. 8/311:25 pmISP - OAK

2 stops12h 25mSouthwest

Deal found 7/27

$472

jue. 7/316:00 amOAK - ISP

3 stops24h 56mMultiple Airlines

dom. 8/107:39 pmISP - OAK

2 stops30h 54mMultiple Airlines

Deal found 7/27

$1,270

Best flights from Oakland to Islip
Discover carefully curated flight deals from Oakland to Islip that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated julio 29, 2025.

mar. 8/267:00 amOAK - ISP

2 stops12h 05mSouthwest

dom. 8/311:25 pmISP - OAK

2 stops12h 25mSouthwest

Deal found 7/27

$472

Last-minute flights from Oakland to Islip
Discover last-minute flight deals from Oakland to Islip. Data last updated julio 29, 2025 and is based on user searches.

jue. 7/316:00 amOAK - ISP

3 stops24h 56mMultiple Airlines

dom. 8/107:39 pmISP - OAK

2 stops30h 54mMultiple Airlines

Deal found 7/27

$1,270

mar. 8/267:00 amOAK - ISP

2 stops12h 05mSouthwest

dom. 8/311:25 pmISP - OAK

2 stops12h 25mSouthwest

Deal found 7/27

$472

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 julio 29, 2025.

mié. 9/177:20 amOAK - ISP

2 stops11h 45mSouthwest

Deal found 7/28

$219

dom. 9/218:33 amOAK - ISP

3 stops26h 12mMultiple Airlines

Deal found 7/28

$394

Fly from

Fly to

Route

Depart

Return

Price

OaklandIslip

OAK - ISP

OAKISP

Oakland

mar. 8/26

7:00 am-10:05 pm

2 stops12h 05m

Islip Long Island

dom. 8/31

1:25 pm-10:50 pm

2 stops12h 25m

$472

OaklandIslip

OAK - ISP

OAKISP

Oakland

mié. 9/17

7:20 am-10:05 pm

2 stops11h 45m

$219

OaklandIslip

OAK - ISP

OAKISP

Oakland

dom. 9/21

8:33 am-1:45 pm

3 stops26h 12m

$394

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

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, New York?

Currently, January is the cheapest month in which you can book a flight from Oakland, California to Islip, New York (average of $108). Flying from Oakland, California to Islip, New York 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.

Reviews of airlines servicing Islip

Get a feel of what it's like to fly with Southwest from Oakland to Islip by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,238 reviews

Reviews

1 / 20

10.0

Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Southwest

8.0

Very good

4,238 reviews

Southwest

8.0

Very good

4,238 reviews

Reviews

1 / 20

10.0

Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

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, New York?
Currently, January is the cheapest month in which you can book a flight from Oakland, California to Islip, New York (average of $108). Flying from Oakland, California to Islip, New York 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.

See more FAQs

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Complete your trip

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$219+ Cheap flights from Oakland, CA to Islip, NY (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 9/17. 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

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Oakland to Islip

Round-trip from

One-way from

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 julio 29, 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 julio 29, 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, New York?

Reviews of airlines servicing Islip

Get insights into the airlines that provide service to Islip. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Islip. Reviews last updated julio 29, 2025.

Get a feel of what it's like to fly with Southwest from Oakland to Islip by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

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, New York?

Traveling to a place near Islip?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Oakland to Islip

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Book with Flexibility

Travel Smart

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 julio 29, 2025.