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$174+ Cheap flights from Rapid City to Ontario (RAP - ONT)

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 1/4. Fares are subject to change and may not be available on all flights or dates of travel.
RAP — ONT
Jan 21 — Jan 281
Wed 1/21
Wed 1/28
1 adult, Economy
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Cheap flight deals from Rapid City to Ontario

Cheapest flights from Rapid City to Ontario
Explore the most affordable flight options available from Rapid City to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 22, 2025.

This United Airlines deal was found by Cheapflights users on 12/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/263:35 pmRAP - ONT
1 stop6h 32mUnited Airlines
Wed 12/315:05 amONT - RAP
1 stop6h 41mUnited Airlines
Deal found 12/21$610
This United Airlines deal was found by Cheapflights users on 12/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/233:35 pmRAP - ONT
1 stop6h 32mUnited Airlines
Thu 12/255:05 amONT - RAP
1 stop5h 27mUnited Airlines
Deal found 12/20$875

Find flight deals from Rapid City to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Rapid City (RAP) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 22, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$359
(United Airlines)

One-way from

$174
(Kiwi.com)

Popular in

November

Cheapest in

August

Average price

$441
Provider with most accurate pricing for Rapid City-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Rapid City-Ontario flights.
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From Rapid City to Ontario
Search Deals
One-way flight from Rapid City to Ontario
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($52 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Rapid City to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 22, 2025.
Use the filters below to find and compare flights from Rapid City to Ontario that are best for you.

Fly from

Rapid City

Fly to

Ontario

Route

Depart

Return

Price

Rapid CityOntario

RAP - ONT

RAPONT

Rapid City

Tue 1/6

4:40 pm-8:58 pm

1 stop5h 18m

Ontario

Sat 1/10

5:05 am-11:25 am

1 stop5h 20m

$309

Rapid CityOntario

RAP - ONT

RAPONT

Rapid City

Wed 1/21

4:40 pm-8:58 pm

1 stop5h 18m

Ontario

Sat 1/24

5:05 am-1:12 pm

1 stop7h 07m

$359

Rapid CityOntario

RAP - ONT

RAPONT

Rapid City

Sun 1/4

9:15 pm-5:15 pm

2 stops21h 00m

$174

Rapid CityOntario

RAP - ONT

RAPONT

Rapid City

Sun 1/4

3:35 pm-9:07 pm

1 stop6h 32m

$281

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/20

Compare providers for flights from Rapid City to Ontario

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Rapid City to Ontario in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Rapid City-Ontario flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Rapid City-Ontario flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Rapid City-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Rapid City-Ontario flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Rapid City-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Rapid City to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Rapid City 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 Rapid City to Ontario

What is the cheapest month to book a flight from Rapid City to Ontario?

Currently, June is the cheapest month in which you can book a flight from Rapid City to Ontario (average of $140). Flying from Rapid City to Ontario in March is currently the most expensive (average of $338). 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 Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated December 22, 2025.
Read reviews from past customers who have flown United Airlines from Rapid City to Ontario. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,102 reviews

Entertainment

7.1

Boarding

7.7

Crew

8.1

Overall

7.4

Comfort

7.3

Food

6.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
United Airlines
7.4
Good
9,102 reviews
United Airlines
7.4
Good
9,102 reviews

Entertainment

7.1

Boarding

7.7

Crew

8.1

Overall

7.4

Comfort

7.3

Food

6.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

Related info for your journey

Find useful and relevant information for your journey from Rapid City to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Rapid City to Ontario?

    For as low as $309, United Airlines can have you in Ontario from Rapid City in 5h 18m. The distance between Rapid City and Ontario is about 1038 mi.

  • What is the cheapest airline to fly from Rapid City to Ontario round-trip?

    According to our current data, United Airlines ($286), offers the cheapest pricing from Rapid City to Ontario. You may be able to fly from Rapid City to Ontario for 25% less than the average price by searching for this airline.

  • Can I find deals for flights from Rapid City to Ontario that include hotel bookings?

    Yes. In addition to deals on Rapid City to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Rapid City to Ontario?

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

  • Can I find deals for business class flights from Rapid City to Ontario?

    Yes. Cheapflights offers flight deals from Rapid City to Ontario 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 Rapid City to Ontario?

    Currently, June is the cheapest month in which you can book a flight from Rapid City to Ontario (average of $140). Flying from Rapid City to Ontario in March is currently the most expensive (average of $338). 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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Top airline flying from Rapid City to Ontario

Discover the top airline that operate flights from Rapid City to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$286Average$398FlexibilityNo cancel feeOn-time69%

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