$398 Cheap Flights from Ontario (ONT) to Nagasaki (NGS)

View $398 flight on Tue, Nov 4, 2025Opens in a new window

Popular airlines from Los Angeles - Ontario Intl. Airport (ONT) to Nagasaki Airport (NGS)

Cheap Flights from Ontario to Nagasaki (ONT-NGS)

Prices were available within the past 7 days and start at $398 for one-way flights and $823 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Korean Air
Tue, Nov 18 - Tue, Nov 25
ONT
Ontario
NGS
Nagasaki
$823 Roundtrip, found 2 days ago
$823
Roundtrip
found 2 days ago
Select Korean Air flight, departing Tue, Nov 18 from Ontario to Nagasaki, returning Tue, Nov 25, priced at $823 found 2 days ago
United
Sun, Nov 30 - Mon, Dec 15
ONT
Ontario
NGS
Nagasaki
$835 Roundtrip, found 2 days ago
$835
Roundtrip
found 2 days ago
Select United flight, departing Sun, Nov 30 from Ontario to Nagasaki, returning Mon, Dec 15, priced at $835 found 2 days ago
United
Sun, Dec 7 - Sun, Dec 21
ONT
Ontario
NGS
Nagasaki
$835 Roundtrip, found 4 days ago
$835
Roundtrip
found 4 days ago
Select United flight, departing Sun, Dec 7 from Ontario to Nagasaki, returning Sun, Dec 21, priced at $835 found 4 days ago
United
Mon, Dec 1 - Mon, Dec 15
ONT
Ontario
NGS
Nagasaki
$841 Roundtrip, found 2 days ago
$841
Roundtrip
found 2 days ago
Select United flight, departing Mon, Dec 1 from Ontario to Nagasaki, returning Mon, Dec 15, priced at $841 found 2 days ago
United
Tue, Nov 18 - Sat, Nov 22
ONT
Ontario
NGS
Nagasaki
$851 Roundtrip, found 2 days ago
$851
Roundtrip
found 2 days ago
Select United flight, departing Tue, Nov 18 from Ontario to Nagasaki, returning Sat, Nov 22, priced at $851 found 2 days ago
United
Tue, Nov 4 - Tue, Nov 11
ONT
Ontario
NGS
Nagasaki
$852 Roundtrip, found 2 days ago
$852
Roundtrip
found 2 days ago
Select United flight, departing Tue, Nov 4 from Ontario to Nagasaki, returning Tue, Nov 11, priced at $852 found 2 days ago
United
Tue, Nov 4 - Tue, Nov 11
ONT
Ontario
NGS
Nagasaki
$852 Roundtrip, found 4 days ago
$852
Roundtrip
found 4 days ago
Select United flight, departing Tue, Nov 4 from Ontario to Nagasaki, returning Tue, Nov 11, priced at $852 found 4 days ago
Delta
Thu, Nov 27 - Tue, Dec 9
ONT
Ontario
NGS
Nagasaki
$860 Roundtrip, found 4 days ago
$860
Roundtrip
found 4 days ago
Select Delta flight, departing Thu, Nov 27 from Ontario to Nagasaki, returning Tue, Dec 9, priced at $860 found 4 days ago
American Airlines
Tue, Nov 25 - Tue, Dec 9
ONT
Ontario
NGS
Nagasaki
$884 Roundtrip, found 4 days ago
$884
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Nov 25 from Ontario to Nagasaki, returning Tue, Dec 9, priced at $884 found 4 days ago
Hawaiian Airlines
Wed, Nov 26 - Sun, Dec 7
ONT
Ontario
NGS
Nagasaki
$1,525 Roundtrip, found 2 days ago
$1,525
Roundtrip
found 2 days ago
Select Hawaiian Airlines flight, departing Wed, Nov 26 from Ontario to Nagasaki, returning Sun, Dec 7, priced at $1,525 found 2 days ago

Alternative airports near Nagasaki

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Nagasaki Airport NGS. Cheapest and Closest option available. Average driving time to city center is 28 minutes. Flights from $1,027
NGS
Nagasaki Airport
CheapestClosest
Average driving time to city center28 min
Flights from $1,027
Flights from Ontario (ONT) to Nagasaki (NGS)
Origin airport
Los Angeles - Ontario Intl.
Destination airport
Nagasaki
Roundtrip price
$822
Distance
6066 mi

Ontario to Nagasaki Flights

The cheapest times to fly from Ontario to Nagasaki

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

 

The best time to book a flight from Ontario to Nagasaki

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

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 Nagasaki in 2025. You can also book with separate airlines for your outbound and return journeys, from $398 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 Nagasaki 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 Nagasaki 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.

 

Frequently asked questions

How much does a flight from Los Angeles - Ontario Intl. Airport (ONT) to Nagasaki Airport (NGS) cost?
Get a cheap one-way flight from $398 or cheap return flight from $823 from Los Angeles - Ontario Intl. Airport (ONT) to Nagasaki Airport (NGS) 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 Nagasaki Airport (NGS)?
The cheapest month to fly from ONT to NGS is November, when demand is low. Off-peak months are generally when better flight deals are available between these airports.
What is the cheapest airline that flies from Los Angeles - Ontario Intl. Airport (ONT) to Nagasaki Airport (NGS)?
Expedia's filter tool lets you easily compare different airlines, departure times and fares all in one place. Choose your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest ONT to NGS flight.
How many flights per day from Los Angeles - Ontario Intl. Airport (ONT) to Nagasaki Airport (NGS)?
Direct flights from Los Angeles - Ontario Intl. Airport (ONT) to Nagasaki Airport (NGS) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your dates and click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from ONT to NGS?
Friday is usually the busiest day for flights, while Tuesday is often the quietest.* Remember that flight schedules can change depending on various factors, including the season and airline.*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 Nagasaki Airport (NGS)?
To avoid potential delays on the Los Angeles - Ontario Intl. Airport (ONT) to Nagasaki Airport (NGS) route, travel before 3 PM. Later flights have a 22% higher chance of being 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 Los Angeles - Ontario Intl. Airport (ONT) to Nagasaki Airport (NGS) last-minute?
Booking your plane ticket from ONT to NGS just before your trip is typically more expensive. But if you're flexible with your departure times and dates, you could snag a cheap last-minute fare.
Is it cheaper to book an ONT to NGS flight and hotel package?
Opting for an ONT to NGS flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip all in one place. Pick from our impressive range of accommodations and then add flights, activities and car rentals to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Los Angeles - Ontario Intl. Airport (ONT) to Nagasaki Airport (NGS)?
It's usually possible to cancel or reschedule your ONT to NGS flight. However, for bookings made more than 24 hours ago, additional fees may apply. Check your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find further details on our Customer Service portal.

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*Available to One Key members.