Ontario

$63+ Cheap flights from District of Columbia to Ontario (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 2/25. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — ONT
Jan 26 — Feb 21
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Cheap flight deals from District of Columbia to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from District of Columbia (USDC) 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 January 21, 2025.

Round-trip from

$260
(Frontier)

One-way from

$63
(Trip.com)
From District of Columbia to Ontario
One-way flight from District of Columbia to Ontario

Find flight deals from District of Columbia to Ontario

Cheapest flights from District of Columbia to Ontario
Explore the most affordable flight options available from District of Columbia to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2025.

This Frontier deal was found by Cheapflights users on 1/21. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/301:01 pmDCA - ONT
1 stop13h 46mFrontier
Mon 2/310:40 amONT - DCA
1 stop8h 19mFrontier
Deal found 1/21$257
This Delta deal was found by Cheapflights users on 1/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/34:53 pmIAD - ONT
1 stop8h 59mDelta
Tue 2/111:00 pmONT - IAD
1 stop8h 22mDelta
Deal found 1/20$324
This Delta deal was found by Cheapflights users on 1/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/193:50 pmDCA - ONT
1 stop10h 02mDelta
Sat 3/17:05 amONT - DCA
1 stop9h 33mDelta
Deal found 1/20$327
This American Airlines deal was found by Cheapflights users on 1/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/255:13 pmIAD - ONT
1 stop8h 03mAmerican Airlines
Wed 3/56:05 amONT - IAD
1 stop7h 07mAmerican Airlines
Deal found 1/20$328
This American Airlines deal was found by Cheapflights users on 1/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/66:06 amDCA - ONT
1 stop10h 45mAmerican Airlines
Tue 2/116:00 amONT - DCA
2 stops8h 59mAmerican Airlines
Deal found 1/20$332
This Alaska Airlines deal was found by Cheapflights users on 1/21. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/226:30 amIAD - ONT
1 stop12h 02mAlaska Airlines
Wed 4/3011:46 amONT - IAD
1 stop9h 12mAlaska Airlines
Deal found 1/21$361
This Southwest deal was found by Cheapflights users on 1/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/182:00 pmDCA - ONT
2 stops11h 05mSouthwest
Fri 2/218:50 amONT - DCA
1 stop11h 20mSouthwest
Deal found 1/20$382
This Southwest deal was found by Cheapflights users on 1/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/147:50 pmIAD - ONT
1 stop7h 20mSouthwest
Sat 3/2210:50 amONT - IAD
1 stop10h 20mSouthwest
Deal found 1/20$406
This Travelocity deal was found by Cheapflights users on 1/19. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/168:00 amDCA - ONT
1 stop13h 19mMultiple Airlines
Mon 3/1712:59 amONT - DCA
1 stop8h 04mMultiple Airlines
Deal found 1/19$417
This United Airlines deal was found by Cheapflights users on 1/21. 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.
Wed 2/194:14 pmDCA - ONT
1 stop7h 38mUnited Airlines
Wed 2/266:00 amONT - DCA
1 stop6h 53mUnited Airlines
Deal found 1/21$427
This United Airlines deal was found by Cheapflights users on 1/20. 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.
Mon 2/32:42 pmIAD - ONT
1 stop8h 47mUnited Airlines
Sun 2/91:45 pmONT - IAD
1 stop6h 45mUnited Airlines
Deal found 1/20$427
This Alaska Airlines deal was found by Cheapflights users on 1/20. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/311:59 amDCA - ONT
2 stops13h 14mAlaska Airlines
Thu 2/66:00 amONT - DCA
2 stops13h 15mAlaska Airlines
Deal found 1/20$538

Find flights from District of Columbia to Ontario within your budget

Customize your flight search to find flights from District of Columbia 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 January 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Sun 2/16

6:00 pm-11:54 pm

1 stop8h 54m

Ontario

Sat 2/22

12:59 am-12:03 pm

1 stop8h 04m

$260

Washington, D.C.Ontario

IAD - ONT

IADONT

Washington, D.C. Dulles Intl

Mon 2/3

4:53 pm-10:52 pm

1 stop8h 59m

Ontario

Tue 2/11

1:00 pm-12:22 am

1 stop8h 22m

$324

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Wed 2/19

3:50 pm-10:52 pm

1 stop10h 02m

Ontario

Sat 3/1

7:05 am-7:38 pm

1 stop9h 33m

$327

Washington, D.C.Ontario

IAD - ONT

IADONT

Washington, D.C. Dulles Intl

Tue 2/25

5:13 pm-10:16 pm

1 stop8h 03m

Ontario

Wed 3/5

6:05 am-4:12 pm

1 stop7h 07m

$328

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Thu 2/6

6:06 am-1:51 pm

1 stop10h 45m

Ontario

Tue 2/11

6:00 am-5:59 pm

2 stops8h 59m

$332

Washington, D.C.Ontario

IAD - ONT

IADONT

Washington, D.C. Dulles Intl

Tue 4/22

6:30 am-3:32 pm

1 stop12h 02m

Ontario

Wed 4/30

11:46 am-11:58 pm

1 stop9h 12m

$361

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Tue 2/18

2:00 pm-10:05 pm

2 stops11h 05m

Ontario

Fri 2/21

8:50 am-11:10 pm

1 stop11h 20m

$382

Washington, D.C.Ontario

IAD - ONT

IADONT

Washington, D.C. Dulles Intl

Fri 3/14

7:50 pm-12:10 am

1 stop7h 20m

Ontario

Sat 3/22

10:50 am-12:10 am

1 stop10h 20m

$406

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Sun 3/16

8:00 am-6:19 pm

1 stop13h 19m

Ontario

Mon 3/17

12:59 am-12:03 pm

1 stop8h 04m

$417

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Wed 2/19

4:14 pm-8:52 pm

1 stop7h 38m

Ontario

Wed 2/26

6:00 am-3:53 pm

1 stop6h 53m

$427

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Showing 1-10 of 24 results
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Best time to book a flight from District of Columbia to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from District of Columbia 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.

Travel insights for flights from District of Columbia to Ontario

Get recent, data-driven insights about flights from District of Columbia to Ontario including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from District of Columbia to Ontario?

Currently, August is the cheapest month in which you can book a flight from District of Columbia to Ontario (average of $246). Flying from District of Columbia to Ontario in March is currently the most expensive (average of $310). 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 DC to ONT?

Find hourly flight availability from District of Columbia to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 21, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from District of Columbia to Ontario as you normally would.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

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 January 21, 2025.
Get a feel of what it's like to fly with Frontier, Alaska Airlines and Southwest from District of Columbia to Ontario by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.1
Very good
4,662 reviews

Comfort

8.1

Boarding

8.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

8.1
Very good
4,662 reviews
8.1
Very good
4,662 reviews

Comfort

8.1

Boarding

8.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

8.0
Very good
9,706 reviews
8.1
Very good
4,662 reviews

Comfort

8.1

Boarding

8.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

8.0
Very good
8,521 reviews
8.1
Very good
4,662 reviews

Comfort

8.1

Boarding

8.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

7.4
Good
8,985 reviews
8.1
Very good
4,662 reviews

Comfort

8.1

Boarding

8.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

7.2
Good
10,000 reviews
8.1
Very good
4,662 reviews

Comfort

8.1

Boarding

8.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

Related info for your journey

Find useful and relevant information for your journey from District of Columbia to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What airport do you fly into for flights to Ontario from District of Columbia?

    If you book a flight to Ontario from District of Columbia, you will be flying to Ontario, which is the city’s only airport. Ontario (ONT) is located 3.1 mi from the center of Ontario.

  • What are the cheapest airlines to fly from District of Columbia to Ontario one-way?

    The cheapest airlines for a one-way flight from District of Columbia to Ontario are Frontier ($63), Delta ($164), and American Airlines ($169).

  • Can I find deals for flights from District of Columbia to Ontario that include hotel bookings?

    Yes. In addition to deals on District of Columbia to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from District of Columbia to Ontario?

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

  • Can I find deals for business class flights from District of Columbia to Ontario?

    Yes. Cheapflights offers flight deals from District of Columbia 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 District of Columbia to Ontario?

    Currently, August is the cheapest month in which you can book a flight from District of Columbia to Ontario (average of $246). Flying from District of Columbia to Ontario in March is currently the most expensive (average of $310). 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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Alternative routes for District of Columbia to Ontario

See prices for flight routes from nearby airports that may be better suited for you.

Top 5 airlines flying from District of Columbia to Ontario

Discover the top 5 airlines that operate flights from District of Columbia 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 January 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$148Average$262FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$195Average$511FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$219Average$511FlexibilityNo cancel feeOn-time71%
DeltaCheapest$267Average$455FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$326Average$508FlexibilityNo cancel feeOn-time63%
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