In terms of precipitation, rainfall in Oakland, California ranges from 0.0 - 4.8 inches per month. January is typically the wettest month, when rainfall can reach 4.8 in. July is typically the driest time to visit Oakland, California when rainfall is around 0.0 in.

If weather is an important factor for your trip to Oakland, California, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

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

To save up to 82% on this flight, we recommend booking at least 39 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Islip, New York to Oakland, California from $472 1-2 weeks out and tickets from $737 for flights departing within the next 72 hours.

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

Due to multiple factors, expect to potentially pay more when booking in December. For low rates, February can be a great choice for travel to Oakland, California. Flights to Oakland, California from Islip, New York in February are about $413 on average during February, but can be found for as low as $169.

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

When flying from Islip, New York to Oakland, California, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

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

How can I find direct flights from Islip to Oakland?

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

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

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

$429+ Flights from Islip, NY to Oakland, CA

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Cheap flight deals from Islip to Oakland

Popular in	December
Cheapest in	February
Average price	$437

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 ($12 potential savings vs. average RT price).

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Average for round-trip flights in July 2025

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One-way flights from Islip to Oakland
Search for one-way flight options from Islip to Oakland. Find affordable one-way fares based on user searches. Data last updated July 16, 2025.

Tue 7/224:40 pmISP - OAK

2 stops9h 40mSouthwest

Deal found 7/16

$429

Tue 7/221:55 pmISP - OAK

3 stops21h 33mMultiple Airlines

Deal found 7/16

$521

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

IslipOakland

ISP - OAK

ISPOAK

Islip Long Island

Tue 7/22

4:40 pm-11:20 pm

2 stops9h 40m

$429

IslipOakland

ISP - OAK

ISPOAK

Islip Long Island

Tue 7/22

1:55 pm-8:28 am

3 stops21h 33m

$521

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/16

Best time to book a flight from Islip to Oakland

Have a flexible travel schedule? Discover the best time to fly to Oakland from Islip 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 Islip to Oakland

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

Currently, April is the cheapest month in which you can book a flight from Islip, New York to Oakland, California (average of $183). Flying from Islip, New York to Oakland, California in November is currently the most expensive (average of $259). 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 Oakland

See what other customers who have flown with Southwest from Islip to Oakland have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,241 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

4,241 reviews

Southwest

8.0

Very good

4,241 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 Islip to Oakland that include hotel bookings?
Yes. In addition to deals on Islip to Oakland flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Islip to Oakland?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Islip to Oakland.
Can I find deals for business class flights from Islip to Oakland?
Yes. Cheapflights offers flight deals from Islip to Oakland 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 Islip, New York to Oakland, California?
Currently, April is the cheapest month in which you can book a flight from Islip, New York to Oakland, California (average of $183). Flying from Islip, New York to Oakland, California in November is currently the most expensive (average of $259). 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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$429+ Cheap flights from Islip, NY to Oakland, CA (ISP - OAK)

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 7/22. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Islip to Oakland with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Islip to Oakland

Popular in

Cheapest in

Average price

Find flight deals from Islip to Oakland

One-way flights from Islip to OaklandSearch for one-way flight options from Islip to Oakland. Find affordable one-way fares based on user searches. Data last updated July 16, 2025.

Search for one-way flight options from Islip to Oakland. Find affordable one-way fares based on user searches. Data last updated July 16, 2025.

Cheapflights Fare Finder

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

Best time to book a flight from Islip to Oakland

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

Cheapflights Insights

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

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

Reviews of airlines servicing Oakland

See what other customers who have flown with Southwest from Islip to Oakland have to say. You can also see how each airline compares 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 Islip to Oakland. 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 Islip to Oakland that include hotel bookings?

How can I find direct flights from Islip to Oakland?

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

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

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One-way flights from Islip to Oakland
Search for one-way flight options from Islip to Oakland. Find affordable one-way fares based on user searches. Data last updated July 16, 2025.