Cheap flights from Ontario, United States to Washington, D.C., United States
Choose between Frontier Airlines, Spirit Airlines, or Alaska Airlines to find the best price
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Tips to know when travelling to Washington, D.C.
Most popular airline | Frontier Airlines |
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Book your trip to arrive at Baltimore–Washington International, Washington Dulles International, or Ronald Reagan Washington National. The most popular airlines for this route are Frontier Airlines, Spirit Airlines, Alaska Airlines, United Airlines, and JetBlue Airways. Ontario and Washington, D.C. have 221 direct flights per week. When you arrive at Washington, D.C., consider visiting National Mall, Lincoln Memorial, and Independence National Historical Park, PA, USA.
Check-in for a flight from Ontario to Washington, D.C.
Name | Carrier code | IATA Code | Passport needed during booking | Online check-in available |
---|---|---|---|---|
Frontier Airlines | FFT | F9 | No | Opens 24 days before flight Closes 1 hours before flight |
Spirit Airlines | NKS | NK | No | Opens 24 days before flight Closes 1 hours before flight |
Alaska Airlines | ASA | AS | No | Opens 24 days before flight Closes 1 hours before flight |
United Airlines | UAL | UA | Yes | No |
JetBlue Airways | JBU | B6 | No | Opens 24 days before flight Closes 2 hours before flight |
Weather in Washington, D.C.
Average Weather
Month | Average monthly max temperature | Average monthly min temperature |
January | 5°C | -1°C |
February | 8°C | 0°C |
March | 12°C | 3°C |
April | 19°C | 8°C |
May | 23°C | 13°C |
June | 28°C | 18°C |
July | 31°C | 21°C |
August | 30°C | 20°C |
September | 26°C | 17°C |
October | 20°C | 11°C |
November | 13°C | 4°C |
December | 8°C | 1°C |
14 day forecast
Frequently asked questions
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