$429 Cheap Flights from Ontario (ONT) to Nantucket (ACK)

View $429 flight on Tue, Sep 1, 2026Opens in a new window

Popular airlines from Los Angeles - Ontario Intl. Airport (ONT) to Nantucket, MA (ACK-Nantucket Memorial)

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Cheap Flights from Ontario to Nantucket (ONT-ACK)

Prices were available within the past 7 days and start at $429 for one-way flights and $1,100 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Sun, Nov 2 - Sun, Nov 9
ONT
Ontario
ACK
Nantucket
$1,100 Roundtrip, found 1 day ago
$1,100
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sun, Nov 2 from Ontario to Nantucket, returning Sun, Nov 9, priced at $1,100 found 1 day ago
American Airlines
Sun, Nov 2 - Sun, Nov 9
ONT
Ontario
ACK
Nantucket
$1,130 Roundtrip, found 1 day ago
$1,130
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sun, Nov 2 from Ontario to Nantucket, returning Sun, Nov 9, priced at $1,130 found 1 day ago
JetBlue Airways
Thu, Jun 25 - Sun, Jun 28
ONT
Ontario
ACK
Nantucket
$1,138 Roundtrip, found 2 days ago
$1,138
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Thu, Jun 25 from Ontario to Nantucket, returning Sun, Jun 28, priced at $1,138 found 2 days ago
American Airlines
Sun, Nov 2 - Sun, Nov 9
ONT
Ontario
ACK
Nantucket
$1,195 Roundtrip, found 1 day ago
$1,195
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sun, Nov 2 from Ontario to Nantucket, returning Sun, Nov 9, priced at $1,195 found 1 day ago
JetBlue Airways
Thu, Jun 25 - Sun, Jun 28
ONT
Ontario
ACK
Nantucket
$2,975 Roundtrip, found 2 days ago
$2,975
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Thu, Jun 25 from Ontario to Nantucket, returning Sun, Jun 28, priced at $2,975 found 2 days ago
JetBlue Airways
Thu, Jun 25 - Sun, Jun 28
ONT
Ontario
ACK
Nantucket
$2,981 Roundtrip, found 2 days ago
$2,981
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Thu, Jun 25 from Ontario to Nantucket, returning Sun, Jun 28, priced at $2,981 found 2 days ago
JetBlue Airways
Thu, Jun 25 - Sun, Jun 28
ONT
Ontario
ACK
Nantucket
$2,987 Roundtrip, found 2 days ago
$2,987
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Thu, Jun 25 from Ontario to Nantucket, returning Sun, Jun 28, priced at $2,987 found 2 days ago
JetBlue Airways
Thu, Jun 25 - Sun, Jun 28
ONT
Ontario
ACK
Nantucket
$3,041 Roundtrip, found 2 days ago
$3,041
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Thu, Jun 25 from Ontario to Nantucket, returning Sun, Jun 28, priced at $3,041 found 2 days ago
JetBlue Airways
Thu, Jun 25 - Sun, Jun 28
ONT
Ontario
ACK
Nantucket
$3,046 Roundtrip, found 2 days ago
$3,046
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Thu, Jun 25 from Ontario to Nantucket, returning Sun, Jun 28, priced at $3,046 found 2 days ago
Alaska Airlines
Thu, Jun 25 - Sun, Jun 28
ONT
Ontario
ACK
Nantucket
$3,061 Roundtrip, found 2 days ago
$3,061
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Thu, Jun 25 from Ontario to Nantucket, returning Sun, Jun 28, priced at $3,061 found 2 days ago

Frequently asked questions

How much does a flight from Los Angeles - Ontario Intl. Airport (ONT) to Nantucket Memorial Airport (ACK) cost?
Snag a cheap one-way flight from $429 or cheap return flight from $1,100 from Los Angeles - Ontario Intl. Airport (ONT) to Nantucket Memorial Airport (ACK) 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 Los Angeles - Ontario Intl. Airport (ONT) to Nantucket Memorial Airport (ACK)?
November is the least expensive month to fly from ONT to ACK. Traveling during quieter months is often the key to finding better fares.
What is the cheapest airline that flies from Los Angeles - Ontario Intl. Airport (ONT) to Nantucket Memorial Airport (ACK)?
Expedia's filter tool lets you easily compare different airlines, flight durations and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest ONT to ACK flight.
How many flights per day from Los Angeles - Ontario Intl. Airport (ONT) to Nantucket Memorial Airport (ACK)?
Nonstop flights from Los Angeles - Ontario Intl. Airport (ONT) to Nantucket Memorial Airport (ACK) aren't available daily, so you'll have to take a flight with a layover. Explore your options with our filter tool. Enter your travel details and pick either "1 Stop" or "2+ Stops."
What day of the week has the most flights from ONT to ACK?
You'll typically find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can vary from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Los Angeles - Ontario Intl. Airport (ONT) to Nantucket Memorial Airport (ACK)?
To land at Nantucket Memorial Airport (ACK) without delays, choose a flight that takes off from Los Angeles - Ontario Intl. Airport (ONT) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**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 Los Angeles - Ontario Intl. Airport (ONT) to Nantucket Memorial Airport (ACK) last-minute?
Waiting until just before your departure to book your flight from ONT to ACK generally means paying more. While you may come across some last-minute deals, they're not always guaranteed. Be flexible with your travel plans to maximize your chances of getting a bargain.
Is it cheaper to book an ONT to ACK flight and hotel package?
You'll generally save money by securing an ONT to ACK flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one convenient place. Once you've selected your ideal accommodations and flights, consider adding extras like car rentals, activities and tours.
Can I cancel or change the date of my flight from Los Angeles - Ontario Intl. Airport (ONT) to Nantucket Memorial Airport (ACK)?
Typically, you're able to reschedule or cancel your ONT to ACK flight. However, there may be additional charges, especially if you booked over 24 hours ago. Check your itinerary for the airline's guidelines and fees on flight changes, or if you'd like further information, visit our Customer Service portal.

Travel information

Origin airport
Los Angeles - Ontario Intl.
Destination airport
Nantucket Memorial
Roundtrip price
$1,099
Distance
2613 mi

Book with confidence

Ontario to Nantucket Flights

The cheapest times to fly from Ontario to Nantucket

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 Ontario to Nantucket are during the month of November. You can find some of the cheapest flights from Ontario to Nantucket with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Ontario to Nantucket

Sunday is one of the best days to book for cheap flights from Ontario to Nantucket: 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 Ontario to Nantucket

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 Ontario to Nantucket in 2025. You can also book with separate airlines for your outbound and return journeys, from $429 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 Ontario to Nantucket 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 Ontario to Nantucket 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.

 

Ontario to Nantucket Flights

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*Available to One Key members.