$216 Cheap Flights from Rapid City (RAP) to Ontario (ONT)

View $216 flight on Tue, Jan 6, 2026Opens in a new window

Popular airlines from Rapid City Regional Airport (RAP) to Los Angeles - Ontario Intl. Airport (ONT)

Cheap Flights from Rapid City to Ontario (RAP-ONT)

Prices were available within the past 7 days and start at $216 for one-way flights and $259 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Dec 16 - Wed, Jan 7
RAP
Rapid City
ONT
Ontario
$259 Roundtrip, found 1 day ago
$259
Roundtrip
found 1 day ago
Select United flight, departing Tue, Dec 16 from Rapid City to Ontario, returning Wed, Jan 7, priced at $259 found 1 day ago
United
Fri, Nov 14 - Sun, Nov 16
RAP
Rapid City
ONT
Ontario
$264 Roundtrip, found 8 hours ago
$264
Roundtrip
found 8 hours ago
Select United flight, departing Fri, Nov 14 from Rapid City to Ontario, returning Sun, Nov 16, priced at $264 found 8 hours ago
Delta
Wed, Jan 14 - Mon, Jan 26
RAP
Rapid City
ONT
Ontario
$269 Roundtrip, found 1 day ago
$269
Roundtrip
found 1 day ago
Select Delta flight, departing Wed, Jan 14 from Rapid City to Ontario, returning Mon, Jan 26, priced at $269 found 1 day ago
United
Sat, Nov 1 - Sat, Nov 8
RAP
Rapid City
ONT
Ontario
$279 Roundtrip, found 12 hours ago
$279
Roundtrip
found 12 hours ago
Select United flight, departing Sat, Nov 1 from Rapid City to Ontario, returning Sat, Nov 8, priced at $279 found 12 hours ago
United
Tue, Dec 16 - Wed, Jan 7
RAP
Rapid City
ONT
Ontario
$284 Roundtrip, found 1 day ago
$284
Roundtrip
found 1 day ago
Select United flight, departing Tue, Dec 16 from Rapid City to Ontario, returning Wed, Jan 7, priced at $284 found 1 day ago
Delta
Thu, Dec 4 - Wed, Dec 17
RAP
Rapid City
ONT
Ontario
$284 Roundtrip, found 1 day ago
$284
Roundtrip
found 1 day ago
Select Delta flight, departing Thu, Dec 4 from Rapid City to Ontario, returning Wed, Dec 17, priced at $284 found 1 day ago
United
Sat, Nov 1 - Sat, Nov 8
RAP
Rapid City
ONT
Ontario
$287 Roundtrip, found 12 hours ago
$287
Roundtrip
found 12 hours ago
Select United flight, departing Sat, Nov 1 from Rapid City to Ontario, returning Sat, Nov 8, priced at $287 found 12 hours ago
United
Tue, Dec 16 - Wed, Jan 7
RAP
Rapid City
ONT
Ontario
$289 Roundtrip, found 1 day ago
$289
Roundtrip
found 1 day ago
Select United flight, departing Tue, Dec 16 from Rapid City to Ontario, returning Wed, Jan 7, priced at $289 found 1 day ago
United
Sun, Nov 23 - Thu, Nov 27
RAP
Rapid City
ONT
Ontario
$293 Roundtrip, found 2 days ago
$293
Roundtrip
found 2 days ago
Select United flight, departing Sun, Nov 23 from Rapid City to Ontario, returning Thu, Nov 27, priced at $293 found 2 days ago
American Airlines
Sat, Nov 1 - Tue, Nov 4
RAP
Rapid City
ONT
Ontario
$324 Roundtrip, found 2 days ago
$324
Roundtrip
found 2 days ago
Select American Airlines flight, departing Sat, Nov 1 from Rapid City to Ontario, returning Tue, Nov 4, priced at $324 found 2 days ago

Find the cheapest month to fly from Rapid City (RAP) to Ontario (ONT)

May is typically the cheapest month to fly

From $258 - $460 per traveler.

Alternative airports near Ontario

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

Select flight to John Wayne SNA. Average driving time to city center is 42 minutes. Flights from $354
SNA
John Wayne
Average driving time to city center42 min
Flights from $354

Frequently asked questions

How much does a flight from Rapid City Regional Airport (RAP) to Los Angeles - Ontario Intl. Airport (ONT) cost?
Secure a cheap one-way flight from $216 or cheap return flight from $259 from Rapid City Regional Airport (RAP) to Los Angeles - Ontario Intl. Airport (ONT) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Rapid City Regional Airport (RAP) to Los Angeles - Ontario Intl. Airport (ONT)?
The cheapest month to fly from RAP to ONT is December, when demand is low. Off-peak season is usually when airlines offer lower prices between these airports.
What is the cheapest airline that flies from Rapid City Regional Airport (RAP) to Los Angeles - Ontario Intl. Airport (ONT)?
Expedia's filter tool lets you easily compare different airlines, travel time and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest RAP to ONT flight.
How many flights per day from Rapid City Regional Airport (RAP) to Los Angeles - Ontario Intl. Airport (ONT)?
You'll need to hop on a flight with a layover when traveling from Rapid City Regional Airport (RAP) to Los Angeles - Ontario Intl. Airport (ONT). There are no daily direct flights on this route. However, simply filter your search to include one or more stops to discover an option that works for you.
What day of the week has the most flights from RAP to ONT?
Friday is typically the busiest day for flights, while Tuesday is often the quietest.* Remember that flight schedules can change based on a range of factors, such as the time of year and carrier.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Rapid City Regional Airport (RAP) to Los Angeles - Ontario Intl. Airport (ONT)?
Choose a flight from Rapid City Regional Airport (RAP) to Los Angeles - Ontario Intl. Airport (ONT) that leaves before 3 PM to reduce the risk of cancellations and delays. Departures later than this are on average 22% more likely to be 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 Rapid City Regional Airport (RAP) to Los Angeles - Ontario Intl. Airport (ONT) last-minute?
Last-minute fares from RAP to ONT are usually more expensive. To secure the cheapest rates, start looking for flights well ahead of time. That said, if you can play around with your travel dates, it's possible to land a cheap ticket right before your trip.
Is it cheaper to book a RAP to ONT flight and hotel package?
You'll generally save money by booking a RAP to ONT flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one place. After selecting your ideal flights and accommodations, consider other add-ons like car rentals, tours and activities.
Can I cancel or change the date of my flight from Rapid City Regional Airport (RAP) to Los Angeles - Ontario Intl. Airport (ONT)?
In most instances, you can cancel or modify your RAP to ONT flight. However, there may be additional fees, especially if you made your booking over 24 hours ago. Check your itinerary for the airline's fees and rules on flight changes, or if you want more information, head to our Customer Service portal.

Travel information

Origin airport
Rapid City Regional
Destination airport
Los Angeles - Ontario Intl.
Airlines serving
American Airlines, Delta, United
Roundtrip price
$258
Distance
1038 mi

Book with confidence

Rapid City to Ontario Flights

The cheapest times to fly from Rapid City to Ontario

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

 

The best time to book a flight from Rapid City to Ontario

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

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 Rapid City to Ontario in 2025. You can also book with separate airlines for your outbound and return journeys, from $216 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 Rapid City to Ontario 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 Rapid City to Ontario 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.

 

Rapid City to Ontario Flights

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*Available to One Key members.