Find cheap flights to Ontario from £121

Find cheap flights to Ontario from £121

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Find deals from Washington, D.C. to Ontario

Find one-way and return tickets at the lowest prices, whether last-minute or planned in advance.

1 stop
Tue, Jun 9
Washington, D.C. IADOntario ONT
from £121
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2 stops
Tue, Jun 9
Washington, D.C. BWIOntario ONT
from £137
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1 stop
Wed, Jun 10
Washington, D.C. BWIOntario ONT
from £160
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1 stop
Wed, Jun 10
Washington, D.C. IADOntario ONT
from £166
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1 stop
Tue, Jun 9
Washington, D.C. DCAOntario ONT
from £171
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1 stop
Mon, Jun 8
Washington, D.C. BWIOntario ONT
from £217
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Find deals from Washington, D.C. to Ontario

Find one-way and return tickets at the lowest prices, whether last-minute or planned in advance.

2 stops
Sat, Jun 13 – Wed, Jun 17
Washington, D.C. BWIOntario ONT
from £320
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1 stop
Tue, Jun 9 – Fri, Jun 12
Washington, D.C. IADOntario ONT
from £321
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1 stop
Tue, Jun 9 – Fri, Jun 12
Washington, D.C. IADOntario ONT
from £358
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1 stop
Wed, Jun 10 – Fri, Jun 12
Washington, D.C. IADOntario ONT
from £364
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1 stop
Tue, Jun 9 – Sat, Jun 13
Washington, D.C. IADOntario ONT
from £379
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1 stop
Wed, Jun 10 – Fri, Jun 12
Washington, D.C. IADOntario ONT
from £401
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Cheapest time to fly from Washington, D.C. to Ontario

Flexible with dates? We find the best prices for the week around your selected date. Prices may vary after you search.

One-way

Fri, May 8 - Fri, May 15£646
Sat, May 16 - Sat, May 23£1,026
Sun, May 24 - Sun, May 31£816
Mon, Jun 1 - Sun, Jun 7£705
Mon, Jun 8 - Mon, Jun 15£473
Tue, Jun 16 - Tue, Jun 23£480
Wed, Jun 24 - Tue, Jun 30£612
Wed, Jul 1 - Tue, Jul 7£722
Wed, Jul 8 - Wed, Jul 15£461
Thu, Jul 16 - Thu, Jul 23£851
Fri, Jul 24 - Fri, Jul 31£863

Round-trip

Fri, May 8 - Fri, May 15£1,030
Sat, May 16 - Sat, May 23£951
Sun, May 24 - Sun, May 31£794
Mon, Jun 1 - Sun, Jun 7£792
Mon, Jun 8 - Mon, Jun 15£838
Tue, Jun 16 - Tue, Jun 23£886
Wed, Jun 24 - Tue, Jun 30£921
Wed, Jul 1 - Tue, Jul 7£855
Wed, Jul 8 - Wed, Jul 15£808
Thu, Jul 16 - Thu, Jul 23£937
Fri, Jul 24 - Fri, Jul 31£912

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Cheap flights to Ontario

Ontario, United States
Ontario, United States
Ontario, United States
Ontario, United States
Ontario, United States
Ontario, United States
Ontario, United States
Ontario, United States
Ontario, United States
Ontario, United States
Ontario, United States
Ontario, United States
Ontario, United States
Ontario, United States
Ontario, United States
Ontario, United States

Weather in Ontario

Average Weather

MonthAverage monthly max temperatureAverage monthly min temperature
January18°C7°C
February18°C7°C
March20°C8°C
April23°C10°C
May25°C12°C
June29°C16°C
July32°C19°C
August33°C20°C
September31°C18°C
October27°C14°C
November22°C10°C
December17°C7°C
Hottest Month
33°C
August
Coldest month
7°C
February
Sunny days
340
days per year

14 day forecast

Friday
15 May
25°C13°C
22 May
26°C18°C
Saturday
16 May
85%
24°C12°C
23 May
25°C17°C
Sunday
17 May
23°C15°C
24 May
24°C16°C
Monday
18 May
26°C14°C
25 May
24°C15°C
Tuesday
19 May
29°C14°C
26 May
25°C14°C
Wednesday
20 May
32°C16°C
27 May
27°C15°C
Thursday
21 May
30°C17°C
28 May
32°C16°C

Flight connections and travel options

Browse routes from top origins with quick connections

Non-stop flights to Ontario

Explore all available direct routes to Ontario from airports around the world.

Top airlines flying to Ontario

Compare leading airlines serving Ontario.

Airports in and near Ontario

Ontario’s main airport is the primary hub, with nearby airports offering additional options.

Popular flights from Ontario

Find cheap tickets from Ontario to the top departure hubs

Frequently asked questions

Main airports in Ontario, California
Ontario International Airport (ONT) is the main airport serving Ontario, California. It offers domestic and international flights. Other nearby airports include Los Angeles International Airport (LAX) and John Wayne Airport (SNA).
Getting from the airport to Ontario, California
There are several transportation options available to get from the airport to Ontario, California. These include taxis, ride-sharing services, rental cars, and public transportation such as buses or shuttles. Choose the option that best suits your needs and budget.
Best time of year to fly to Ontario, California
The best time to fly to Ontario, California is during the spring or fall when the weather is pleasant and there are fewer crowds. Summers can be hot, while winters may have some rainfall. Consider your preferences and plan accordingly.
Things to do in Ontario, California
Ontario, California offers a variety of attractions and activities for visitors. Explore the scenic beauty of Cucamonga-Guasti Regional Park, visit the Planes of Fame Air Museum for aviation enthusiasts, or enjoy shopping at the Ontario Mills Mall. There's something for everyone!
When to book your flight to Ontario, California
It is recommended to book your flight to Ontario, California in advance for better deals and availability. Prices tend to be higher closer to the travel date. Keep an eye on flight aggregator websites for promotions and discounts.
Ideal duration of stay in Ontario, California
The ideal duration of stay in Ontario, California depends on your travel plans and interests. A few days can be enough to explore the city's attractions. However, if you wish to explore nearby areas or participate in outdoor activities like hiking or golfing, consider staying longer.
Top tourist attractions in Ontario, California
Some top tourist attractions in Ontario, California include Scandia Amusement Park for family fun, Graber Olive House for olive tasting tours, and Citizens Business Bank Arena for sports events and concerts. Don't miss out on exploring historic downtown with its charming shops and restaurants.
Safety walking at night in Ontario, California
Walking at night in Ontario, California is generally safe but it's always important to take precautions. Stick to well-lit areas and avoid isolated places. It's advisable to travel with a companion if possible and trust your instincts if something feels unsafe.
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