How long is the flight from Ontario to Oklahoma City?

Airlines like Frontier fly from Ontario to Oklahoma City in about 21h 39m. The time it takes to get you to your destination can typically vary by up to . Airlines will cover a distance of 1137 mi.

What are the cheapest airlines flying from Ontario to Oklahoma City round-trip?

Our cheapest airline available from Ontario to Oklahoma City is Frontier. Our recent data shows that you can find tickets from as low as $110 on this airline. Additional options worth looking into are Southwest and American Airlines, starting at $266 and $267 round-trip. You may be able to fly from Ontario to Oklahoma City for 67% less than the average price by searching for these airlines.

What is the cheapest day to fly from Ontario to Oklahoma City?

Travelers seeking maximum savings on their Ontario to Oklahoma City flight should consider departing on Monday afternoons when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in Oklahoma City ranges from 1.2 - 5.1 inches per month. May is typically the wettest month, when rainfall can reach 5.1 in. January is typically the driest time to visit Oklahoma City when rainfall is around 1.2 in.

If weather is an important factor for your trip to Oklahoma City, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 37.4 F).

What are the most popular airlines that fly from Ontario to Oklahoma City?

When booking a flight from Ontario to Oklahoma City, you may want to consider flying on American Airlines, Frontier or United Airlines as they are the most popular for this route.

What is the cheapest day to fly round-trip from Ontario to Oklahoma City?

Leaving on a Sunday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 76% on the overall cost on flights from Ontario to Oklahoma City.

How far in advance should I book a flight from Ontario to Oklahoma City?

To save on the cost of your flight from Ontario to Oklahoma City, book at least 48 days before your planned departure. Booking around this time can save you about 64% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $394 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $399.

What is the cheapest month to fly from Ontario to Oklahoma City?

Due to multiple factors, expect to potentially pay more when booking in December. For low rates, April can be a great choice for travel to Oklahoma City. Flights to Oklahoma City from Ontario in April are about $408 on average during April, but can be found for as low as $182.

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

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

How can I find direct flights from Ontario to Oklahoma City?

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

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

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

$72+ Cheap Flights from Ontario to Oklahoma City

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1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

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Cheapflights Tip: The best prices from Ontario to Oklahoma City Will Rogers World are usually found in July or November, booked 77 days in advance, depart on a Monday or Thursday and return on a Sunday

Cheap flight deals from Ontario to Oklahoma City

Round-trip from	$143 (Mytrip)
One-way from	$72 (Mytrip)
Popular in	June
Cheapest in	July
Average price	$301

From Ontario to Oklahoma City Will Rogers World

Search Deals

One-way flight from Ontario to Oklahoma City Will Rogers World

Search Deals

Highest demand for flights based on searches. 5% potential increase in price ($17 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in August 2025

Search Deals

Find flight deals from Ontario to Oklahoma City

Cheapest flights from Ontario to Oklahoma City
Explore the most affordable flight options available from Ontario to Oklahoma City. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 18, 2025.

Thu 9/113:43 pmONT - OKC

1 stop25h 18mFrontier

Mon 9/156:05 amOKC - ONT

1 stop15h 49mFrontier

Deal found 8/17

$143

Thu 9/183:43 pmONT - OKC

1 stop6h 11mFrontier

Sat 9/208:00 amOKC - ONT

1 stop13h 54mFrontier

Deal found 8/18

$144

Fri 9/58:59 pmONT - OKC

1 stop22h 28mFrontier

Mon 9/87:46 pmOKC - ONT

1 stop26h 08mFrontier

Deal found 8/16

$154

Wed 8/2712:59 amONT - OKC

1 stop16h 11mFrontier

Thu 9/116:05 amOKC - ONT

1 stop15h 49mFrontier

Deal found 8/15

$157

Thu 11/612:05 pmONT - OKC

1 stop4h 55mFrontier

Sun 11/97:45 pmOKC - ONT

1 stop6h 05mFrontier

Deal found 8/16

$160

Mon 10/136:53 amONT - OKC

1 stop9h 41mFrontier

Thu 10/167:13 pmOKC - ONT

1 stop16h 22mFrontier

Deal found 8/18

$163

Mon 10/136:53 amONT - OKC

1 stop9h 41mFrontier

Fri 10/177:25 pmOKC - ONT

1 stop6h 25mFrontier

Deal found 8/17

$165

Sat 9/278:59 pmONT - OKC

1 stop24h 50mFrontier

Fri 10/37:46 pmOKC - ONT

1 stop26h 08mFrontier

Deal found 8/17

$166

Sat 10/48:59 pmONT - OKC

1 stop24h 50mFrontier

Mon 10/66:05 amOKC - ONT

1 stop18h 08mFrontier

Deal found 8/18

$167

Tue 9/98:59 pmONT - OKC

1 stop21h 39mFrontier

Thu 9/116:05 amOKC - ONT

1 stop15h 49mFrontier

Deal found 8/16

$171

Fri 9/264:08 pmONT - OKC

1 stop5h 46mFrontier

Sat 9/278:00 amOKC - ONT

1 stop25h 23mFrontier

Deal found 8/17

$183

Thu 9/257:30 pmONT - OKC

1 stop15h 39mFrontier

Fri 9/267:46 pmOKC - ONT

1 stop26h 08mFrontier

Deal found 8/17

$184

Best flights from Ontario to Oklahoma City
Discover carefully curated flight deals from Ontario to Oklahoma City that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 18, 2025.

Tue 9/98:59 pmONT - OKC

1 stop21h 39mFrontier

Thu 9/116:05 amOKC - ONT

1 stop15h 49mFrontier

Deal found 8/16

$143

Fri 9/128:59 pmONT - OKC

1 stop22h 28mFrontier

Sun 9/146:05 amOKC - ONT

1 stop27h 48mFrontier

Deal found 8/18

$143

Fri 9/58:59 pmONT - OKC

1 stop22h 28mFrontier

Mon 9/86:05 amOKC - ONT

1 stop15h 49mFrontier

Deal found 8/18

$143

Thu 9/113:43 pmONT - OKC

1 stop25h 18mFrontier

Mon 9/156:05 amOKC - ONT

1 stop15h 49mFrontier

Deal found 8/17

$143

Fri 10/38:59 pmONT - OKC

1 stop22h 28mFrontier

Sun 10/56:05 amOKC - ONT

1 stop27h 48mFrontier

Deal found 8/16

$144

Fri 9/268:59 pmONT - OKC

1 stop22h 28mFrontier

Tue 9/308:00 amOKC - ONT

1 stop13h 54mFrontier

Deal found 8/17

$144

Sun 9/148:59 pmONT - OKC

1 stop24h 55mFrontier

Sun 9/216:05 amOKC - ONT

1 stop27h 48mFrontier

Deal found 8/17

$144

Thu 9/113:43 pmONT - OKC

1 stop6h 11mFrontier

Sat 9/138:00 amOKC - ONT

1 stop13h 54mFrontier

Deal found 8/18

$144

Fri 9/198:59 pmONT - OKC

1 stop22h 28mFrontier

Sun 9/286:05 amOKC - ONT

1 stop27h 48mFrontier

Deal found 8/17

$144

Fri 9/58:59 pmONT - OKC

1 stop22h 28mFrontier

Fri 9/127:46 pmOKC - ONT

1 stop26h 08mFrontier

Deal found 8/16

$144

Last-minute flights from Ontario to Oklahoma City
Discover last-minute flight deals from Ontario to Oklahoma City. Data last updated August 18, 2025 and is based on user searches.

Thu 8/215:09 pmONT - OKC

1 stop24h 32mFrontier

Mon 8/258:26 pmOKC - ONT

1 stop5h 24mFrontier

Deal found 8/15

$189

Fri 8/225:09 pmONT - OKC

1 stop19h 37mFrontier

Sun 8/247:35 pmOKC - ONT

1 stop15h 10mFrontier

Deal found 8/16

$196

Fri 8/225:09 pmONT - OKC

1 stop19h 37mFrontier

Mon 8/258:26 pmOKC - ONT

1 stop5h 24mFrontier

Deal found 8/17

$198

Wed 8/2712:59 amONT - OKC

1 stop16h 11mFrontier

Thu 9/116:05 amOKC - ONT

1 stop15h 49mFrontier

Deal found 8/15

$157

Fri 9/58:59 pmONT - OKC

1 stop22h 28mFrontier

Mon 9/87:46 pmOKC - ONT

1 stop26h 08mFrontier

Deal found 8/16

$154

Tue 9/98:59 pmONT - OKC

1 stop21h 39mFrontier

Thu 9/116:05 amOKC - ONT

1 stop15h 49mFrontier

Deal found 8/17

$171

Thu 9/113:43 pmONT - OKC

1 stop25h 18mFrontier

Mon 9/157:46 pmOKC - ONT

1 stop26h 08mFrontier

Deal found 8/17

$143

Thu 9/188:59 pmONT - OKC

1 stop20h 02mFrontier

Sat 9/208:00 amOKC - ONT

1 stop13h 54mFrontier

Deal found 8/17

$144

Thu 9/257:30 pmONT - OKC

1 stop15h 39mFrontier

Fri 9/267:46 pmOKC - ONT

1 stop26h 08mFrontier

Deal found 8/17

$184

Fri 9/264:08 pmONT - OKC

1 stop5h 46mFrontier

Sat 9/278:00 amOKC - ONT

1 stop25h 23mFrontier

Deal found 8/17

$183

Sat 9/278:59 pmONT - OKC

1 stop24h 50mFrontier

Fri 10/37:46 pmOKC - ONT

1 stop26h 08mFrontier

Deal found 8/17

$166

Sat 9/278:59 pmONT - OKC

1 stop24h 50mFrontier

Tue 9/308:00 amOKC - ONT

1 stop13h 54mFrontier

Deal found 8/17

$167

One-way flights from Ontario to Oklahoma City
Search for one-way flight options from Ontario to Oklahoma City. Find affordable one-way fares based on user searches. Data last updated August 18, 2025.

Thu 9/183:43 pmONT - OKC

1 stop6h 11mFrontier

Deal found 8/16

$72

Tue 9/212:59 amONT - OKC

1 stop15h 05mFrontier

Deal found 8/15

$77

Thu 10/166:53 amONT - OKC

1 stop9h 35mFrontier

Deal found 8/16

$82

Mon 10/206:53 amONT - OKC

1 stop9h 41mFrontier

Deal found 8/17

$118

Thu 8/286:00 amONT - OKC

2 stops11h 10mFrontier

Deal found 8/17

$125

Fri 10/310:28 pmONT - OKC

2 stops20h 59mFrontier

Deal found 8/16

$127

Sun 8/3110:50 amONT - OKC

1 stop5h 11mAmerican Airlines

Deal found 8/16

$134

Sat 11/812:55 pmONT - OKC

2 stops7h 18mAmerican Airlines

Deal found 8/17

$139

Fri 9/56:00 amONT - OKC

2 stops11h 01mFrontier

Deal found 8/16

$143

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ontario to Oklahoma City that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioOklahoma City

ONT - OKC

ONTOKC

Ontario

Tue 9/9

8:59 pm-8:38 pm

1 stop21h 39m

Oklahoma City Will Rogers World

Thu 9/11

6:05 am-7:54 pm

1 stop15h 49m

$143

OntarioOklahoma City

ONT - OKC

ONTOKC

Ontario

Fri 9/12

8:59 pm-9:27 pm

1 stop22h 28m

Oklahoma City Will Rogers World

Sun 9/14

6:05 am-7:53 am

1 stop27h 48m

$143

OntarioOklahoma City

ONT - OKC

ONTOKC

Ontario

Fri 9/5

8:59 pm-9:27 pm

1 stop22h 28m

Oklahoma City Will Rogers World

Mon 9/8

6:05 am-7:54 pm

1 stop15h 49m

$143

OntarioOklahoma City

ONT - OKC

ONTOKC

Ontario

Thu 9/11

3:43 pm-7:01 pm

1 stop25h 18m

Oklahoma City Will Rogers World

Mon 9/15

6:05 am-7:54 pm

1 stop15h 49m

$143

OntarioOklahoma City

ONT - OKC

ONTOKC

Ontario

Fri 10/3

8:59 pm-9:27 pm

1 stop22h 28m

Oklahoma City Will Rogers World

Sun 10/5

6:05 am-7:53 am

1 stop27h 48m

$144

OntarioOklahoma City

ONT - OKC

ONTOKC

Ontario

Fri 9/26

8:59 pm-9:27 pm

1 stop22h 28m

Oklahoma City Will Rogers World

Tue 9/30

8:00 am-7:54 pm

1 stop13h 54m

$144

OntarioOklahoma City

ONT - OKC

ONTOKC

Ontario

Sun 9/14

8:59 pm-11:54 pm

1 stop24h 55m

Oklahoma City Will Rogers World

Sun 9/21

6:05 am-7:53 am

1 stop27h 48m

$144

OntarioOklahoma City

ONT - OKC

ONTOKC

Ontario

Thu 9/11

3:43 pm-11:54 pm

1 stop6h 11m

Oklahoma City Will Rogers World

Sat 9/13

8:00 am-7:54 pm

1 stop13h 54m

$144

OntarioOklahoma City

ONT - OKC

ONTOKC

Ontario

Fri 9/19

8:59 pm-9:27 pm

1 stop22h 28m

Oklahoma City Will Rogers World

Sun 9/28

6:05 am-7:53 am

1 stop27h 48m

$144

OntarioOklahoma City

ONT - OKC

ONTOKC

Ontario

Fri 9/5

8:59 pm-9:27 pm

1 stop22h 28m

Oklahoma City Will Rogers World

Fri 9/12

7:46 pm-7:54 pm

1 stop26h 08m

$144

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/16

Showing 1-10 of 20 results

Best time to book a flight from Ontario to Oklahoma City

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

How far ahead should I book a flight from Ontario to Oklahoma City?

The price you pay for your flight from Ontario to Oklahoma City may vary depending on when you book. For the best chance of a lower fare, look to book 77 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, January is the cheapest month in which you can book a flight from Ontario to Oklahoma City (average of $348). Flying from Ontario to Oklahoma City in June is currently the most expensive (average of $401). 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.

What is the cheapest time of day to fly from ONT to OKC?

One of the essential ways to save on airfare from Ontario to Oklahoma City is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 44% on airfare.

What’s the top layover airport for flights from Ontario to Oklahoma City?

Phoenix (PHX) – chosen by Cheapflights users on 50% of 1-stop itineraries from Ontario to Oklahoma City on Cheapflights.

What’s the cheapest layover airport for flights from Ontario to Oklahoma City?

Denver (DEN) is the most affordable 1-stop option, with an average round-trip price of $137.

What’s the fastest layover option from Ontario to Oklahoma City?

Flights via Phoenix (PHX) have the shortest average one-way travel time for 1-stop routes: 4h 35m.

Which airport typically offers the quickest layover for flights from Ontario to Oklahoma City?

Flights via Phoenix (PHX) offer the fastest connection on this route, with an average layover time of 1h 03m.

Reviews of airlines servicing Oklahoma City

Read reviews from past customers who have flown Southwest, United Airlines, and American Airlines from Ontario to Oklahoma City. 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.

Southwest

8.0

Very good

4,246 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Southwest

8.0

Very good

4,246 reviews

Southwest

8.0

Very good

4,246 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

United Airlines

7.4

Good

8,925 reviews

Southwest

8.0

Very good

4,246 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

American Airlines

7.2

Good

10,000 reviews

Southwest

8.0

Very good

4,246 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Frontier

5.8

Fair

3,212 reviews

Southwest

8.0

Very good

4,246 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Related info for your journey

How long is the flight from Ontario to Oklahoma City?
Airlines like Frontier fly from Ontario to Oklahoma City in about 21h 39m. The time it takes to get you to your destination can typically vary by up to . Airlines will cover a distance of 1137 mi.
What are the cheapest airlines flying from Ontario to Oklahoma City round-trip?
Our cheapest airline available from Ontario to Oklahoma City is Frontier. Our recent data shows that you can find tickets from as low as $110 on this airline. Additional options worth looking into are Southwest and American Airlines, starting at $266 and $267 round-trip. You may be able to fly from Ontario to Oklahoma City for 67% less than the average price by searching for these airlines.
Can I find deals for flights from Ontario to Oklahoma City that include hotel bookings?
Yes. In addition to deals on Ontario to Oklahoma City flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Ontario to Oklahoma City?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Oklahoma City.
Can I find deals for business class flights from Ontario to Oklahoma City?
Yes. Cheapflights offers flight deals from Ontario to Oklahoma City 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 Ontario to Oklahoma City?
Currently, January is the cheapest month in which you can book a flight from Ontario to Oklahoma City (average of $348). Flying from Ontario to Oklahoma City in June is currently the most expensive (average of $401). 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.

See more FAQs

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Yukon

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Edmond

Midwest City

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Top 4 airlines flying from Ontario to Oklahoma City

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$110	Average$207	FlexibilityNo cancel fee	On-time62%
Southwest	Cheapest$266	Average$376	FlexibilityNo cancel fee	On-time63%
American Airlines	Cheapest$267	Average$366	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$346	Average$386	FlexibilityNo cancel fee	On-time69%

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$72+ Cheap flights from Ontario to Oklahoma City (ONT - OKC)

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 9/18. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Ontario to Oklahoma City with Cheapflights

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2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Ontario to Oklahoma City Will Rogers World are usually found in July or November, booked 77 days in advance, depart on a Monday or Thursday and return on a Sunday

Cheap flight deals from Ontario to Oklahoma City

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Ontario to Oklahoma City

Cheapest flights from Ontario to Oklahoma CityExplore the most affordable flight options available from Ontario to Oklahoma City. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 18, 2025.

Explore the most affordable flight options available from Ontario to Oklahoma City. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 18, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ontario to Oklahoma City that are best for you.

Best time to book a flight from Ontario to Oklahoma City

Have a flexible travel schedule? Discover the best time to fly to Oklahoma City from Ontario with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Oklahoma City

How far ahead should I book a flight from Ontario to Oklahoma City?

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Oklahoma City. Price data was last updated on August 8, 2025.

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

What is the cheapest time of day to fly from ONT to OKC?

Find hourly flight availability from Ontario to Oklahoma City. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 18, 2025.

What’s the top layover airport for flights from Ontario to Oklahoma City?

Share of 1-stop round-trip flights from Ontario to Oklahoma City chosen by Cheapflights users in the past 12 months, using the same layover each way.

What’s the cheapest layover airport for flights from Ontario to Oklahoma City?

Average round-trip fare for 1-stop flights from Ontario to Oklahoma City, chosen by Cheapflights users in the past 12 months, with the same layover each way.

What’s the fastest layover option from Ontario to Oklahoma City?

Shortest average travel time for 1-stop one-way flights from Ontario to Oklahoma City, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Which airport typically offers the quickest layover for flights from Ontario to Oklahoma City?

Average layover duration for 1-stop one-way flights from Ontario to Oklahoma City, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Reviews of airlines servicing Oklahoma City

Read reviews from past customers who have flown Southwest, United Airlines, and American Airlines from Ontario to Oklahoma City. 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.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Oklahoma City. 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 Ontario to Oklahoma City?

What are the cheapest airlines flying from Ontario to Oklahoma City round-trip?

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

How can I find direct flights from Ontario to Oklahoma City?

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

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

Traveling to a place near Oklahoma City?

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Alternative routes for Ontario to Oklahoma City

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Top 4 airlines flying from Ontario to Oklahoma City

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Cheapest flights from Ontario to Oklahoma City
Explore the most affordable flight options available from Ontario to Oklahoma City. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 18, 2025.