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Cheap flights from Niagara Falls, ON to Washington, D.C. Dulles Intl Airport from C$ 189

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 21/4. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — IAD
28 Apr — 5 May1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Niagara Falls to Washington, D.C. Dulles Intl are usually found in February or April, booked 44 days in advance, depart on a Friday or Saturday and return on a Sunday

Cheap flight deals from Niagara Falls to Dulles Intl

Enter your travel dates to find the best prices.

Cheapest flights from Niagara Falls to Dulles Intl
Explore the most affordable flight options available from Niagara Falls to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 March 2026.

Sat 19/97:00 p.m.
YYZ
-
IAD
1 stop3h 59m
United Airlines
Sun 20/98:19 a.m.
IAD
-
YYZ
Nonstop1h 45m
United Airlines
Deal found 28/3C$ 300
Tue 30/68:50 a.m.
YYZ
-
IAD
1 stop5h 18m
United Airlines
Tue 30/610:14 p.m.
IAD
-
YYZ
Nonstop1h 40m
United Airlines
Deal found 29/3C$ 307
Sat 23/51:55 p.m.
YYZ
-
IAD
Nonstop1h 34m
Air Canada
Tue 26/54:05 p.m.
IAD
-
YYZ
Nonstop1h 25m
Air Canada
Deal found 29/3C$ 308
Fri 1/56:55 p.m.
YYZ
-
IAD
Nonstop1h 34m
Air Canada
Mon 4/59:55 a.m.
IAD
-
YYZ
Nonstop1h 27m
Air Canada
Deal found 28/3C$ 310
Mon 20/412:45 p.m.
YYZ
-
IAD
Nonstop1h 39m
United Airlines
Mon 20/45:41 p.m.
IAD
-
YYZ
1 stop4h 42m
United Airlines
Deal found 28/3C$ 311
Tue 28/45:20 p.m.
YYZ
-
IAD
1 stop7h 12m
United Airlines
Wed 29/48:20 a.m.
IAD
-
YYZ
Nonstop1h 44m
United Airlines
Deal found 28/3C$ 313
Sat 9/56:55 p.m.
YYZ
-
IAD
Nonstop1h 34m
Air Canada
Sat 16/53:45 p.m.
IAD
-
YYZ
1 stop6h 13m
Air Canada
Deal found 25/3C$ 315
Wed 27/56:55 p.m.
YYZ
-
IAD
Nonstop1h 34m
Air Canada
Tue 2/63:45 p.m.
IAD
-
YYZ
1 stop6h 13m
Air Canada
Deal found 29/3C$ 321
Thu 7/512:45 p.m.
YYZ
-
IAD
Nonstop1h 39m
United Airlines
Mon 11/510:14 p.m.
IAD
-
YYZ
Nonstop1h 40m
United Airlines
Deal found 26/3C$ 322
Sat 25/46:55 p.m.
YYZ
-
IAD
Nonstop1h 34m
Air Canada
Sun 3/59:55 a.m.
IAD
-
YYZ
Nonstop1h 27m
Air Canada
Deal found 25/3C$ 324
Fri 1/510:30 a.m.
YYZ
-
IAD
1 stop4h 33m
Air Canada
Tue 5/54:05 p.m.
IAD
-
YYZ
Nonstop1h 25m
Air Canada
Deal found 27/3C$ 332

Find flight deals from Niagara Falls to Dulles Intl

Keep the following information in mind while searching for Niagara Falls to Dulles Intl flight deals. Data was last updated 29 March 2026.

Round-trip from

C$ 300

One-way from

C$ 189

Popular in

December

Cheapest in

February

Average price

C$ 406
United Airlines
  • United Airlines
  • 19/9-20/9
  • 1 total stop
  • 5h 44m total
  • Niagara Falls to Washington, D.C.
Search Deals
Air Canada
  • Air Canada
  • 21/4
  • 1 total stop
  • 6h 40m total
  • Niagara Falls to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (C$ 41 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Niagara Falls to Dulles Intl 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 629,999 searches. Data last updated 29 March 2026.
Use the filters below to find and compare flights from Niagara Falls to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Fri 17/4

12:16 p.m.-4:15 p.m.

1 stop3h 59m

Washington, D.C. Dulles Intl

Tue 21/4

12:45 p.m.-5:39 p.m.

1 stop4h 54m

C$ 353
Quickest round-trip

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Fri 24/4

12:45 p.m.-2:24 p.m.

Nonstop1h 39m

Washington, D.C. Dulles Intl

Mon 27/4

10:14 p.m.-11:54 p.m.

Nonstop1h 40m

C$ 357

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Tue 28/4

7:43 p.m.-9:25 p.m.

Nonstop1h 42m

Washington, D.C. Dulles Intl

Wed 29/4

8:20 a.m.-10:04 a.m.

Nonstop1h 44m

C$ 358

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Fri 17/4

2:30 p.m.-4:09 p.m.

Nonstop1h 39m

Washington, D.C. Dulles Intl

Tue 21/4

6:00 a.m.-11:43 a.m.

1 stop5h 43m

C$ 363

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Tue 21/4

3:00 p.m.-9:04 p.m.

1 stop6h 04m

Washington, D.C. Dulles Intl

Wed 22/4

8:23 a.m.-1:47 p.m.

1 stop5h 24m

C$ 364

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Thu 28/5

7:00 a.m.-11:52 a.m.

1 stop4h 52m

Washington, D.C. Dulles Intl

Mon 1/6

6:10 a.m.-11:49 a.m.

1 stop5h 39m

C$ 364

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Sun 3/5

7:00 p.m.-11:25 p.m.

1 stop4h 25m

Washington, D.C. Dulles Intl

Sat 9/5

10:30 p.m.-11:49 a.m.

1 stop13h 19m

C$ 364

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Thu 23/4

1:00 p.m.-7:23 p.m.

1 stop6h 23m

Washington, D.C. Dulles Intl

Thu 30/4

6:15 a.m.-11:49 a.m.

1 stop5h 34m

C$ 365

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Wed 15/4

12:45 p.m.-2:24 p.m.

Nonstop1h 39m

Washington, D.C. Dulles Intl

Mon 20/4

5:17 p.m.-7:02 p.m.

Nonstop1h 45m

C$ 382

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Wed 15/4

7:43 p.m.-9:25 p.m.

Nonstop1h 42m

Washington, D.C. Dulles Intl

Thu 30/4

6:00 a.m.-11:43 a.m.

1 stop5h 43m

C$ 382

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/3

Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3

Best time to book a flight from Niagara Falls to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Niagara Falls 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 Niagara Falls to Washington, D.C. Dulles Intl Airport

How far ahead should I book a flight from Niagara Falls to Washington, D.C. Dulles Intl Airport?

Use this chart to determine the optimal time to book a round-trip flight from Niagara Falls to Dulles Intl. Price data was last updated on 13 March 2026.

To ensure you get the cheapest price possible for a flight from Niagara Falls to Washington, D.C. Dulles Intl Airport, you should look to book at least 44 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Niagara Falls to Washington, D.C. Dulles Intl Airport?

Currently, May is the cheapest month in which you can book a flight from Niagara Falls to Washington, D.C. Dulles Intl Airport (average of C$ 186). Flying from Niagara Falls to Washington, D.C. Dulles Intl Airport in December is currently the most expensive (average of C$ 295). 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 NI4 to IAD?

Find hourly flight availability from Niagara Falls to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 29 March 2026.

It’s optimal to fly from Niagara Falls to Washington, D.C. Dulles Intl Airport in the morning. By choosing this option you can save up to 18% on the cost of your flight, compared to a flight at noon.

What is the cheapest day to fly from Niagara Falls to Washington, D.C. Dulles Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from Niagara Falls to Dulles Intl. Price data was last updated on 23 March 2026.

Travelers seeking maximum savings on their Niagara Falls to Washington, D.C. Dulles Intl Airport flight should consider departing on Thursday at noon when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Niagara Falls to Washington, D.C. Dulles Intl Airport

Explore weekly flight availability from Niagara Falls to Dulles Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 29 March 2026.

The most flights from NI4 to IAD are scheduled on a Monday (18 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (4 on average).

How much does it cost to fly round-trip from Niagara Falls to Washington, D.C. Dulles Intl Airport?

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. 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 Dulles Intl. Reviews last updated 29 March 2026.
Read reviews from past customers who have flown Porter Airlines,United Airlines, andAir Canada from Niagara Falls to Washington, D.C. Dulles Intl Airport. 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.
Porter Airlines
8.0
Very good
430 reviews
Check prices

Comfort

8.0

Entertainment

7.0

Crew

8.6

Boarding

8.2

Food

7.6

Overall

8.0

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
Porter Airlines
8.0
Very good
430 reviews
Porter Airlines
8.0
Very good
430 reviews
Check prices

Comfort

8.0

Entertainment

7.0

Crew

8.6

Boarding

8.2

Food

7.6

Overall

8.0

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
United Airlines
7.4
Good
9,508 reviews
Porter Airlines
8.0
Very good
430 reviews
Check prices

Comfort

8.0

Entertainment

7.0

Crew

8.6

Boarding

8.2

Food

7.6

Overall

8.0

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
Air Canada
7.1
Good
10,856 reviews
Porter Airlines
8.0
Very good
430 reviews
Check prices

Comfort

8.0

Entertainment

7.0

Crew

8.6

Boarding

8.2

Food

7.6

Overall

8.0

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.

Related info for your journey

Find useful and relevant information for your journey from Niagara Falls to Dulles Intl. 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 Niagara Falls to Washington, D.C. Dulles Intl Airport?

    For as low as C$ 357, Delta can have you in Washington, D.C. Dulles Intl Airport from Niagara Falls in 1h 39m. The distance between Niagara Falls and Washington, D.C. Dulles Intl Airport is about 557 km. Both multi-stop and direct flights can be found to your destination and back.

  • What are the most reliable airlines from Niagara Falls to Washington, D.C. Dulles Intl Airport?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Niagara Falls to Washington, D.C. Dulles Intl Airport on time: Avianca (70%), Copa Airlines (70%), Republic Airways (70%).

  • What are the cheapest flights from Niagara Falls to Washington, D.C. Dulles Intl Airport?

    The cheapest flight price from Niagara Falls to Washington, D.C. Dulles Intl Airport is C$ 225. On average you can expect to pay C$ 1,337. The most popular route, (Toronto Pearson Intl - Washington, D.C. Dulles Intl), can usually be booked for C$ 321.

  • Can I find deals for flights from Niagara Falls to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on Niagara Falls to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Niagara Falls to Dulles Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Niagara Falls to Dulles Intl.

  • Can I find deals for business class flights from Niagara Falls to Dulles Intl?

    Yes. Cheapflights offers flight deals from Niagara Falls to Dulles Intl 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 Niagara Falls to Washington, D.C. Dulles Intl Airport?

    Currently, May is the cheapest month in which you can book a flight from Niagara Falls to Washington, D.C. Dulles Intl Airport (average of C$ 186). Flying from Niagara Falls to Washington, D.C. Dulles Intl Airport in December is currently the most expensive (average of C$ 295). 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

Travelling to a place near Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Silver Spring
Warrenton
Winchester
Hanover
Fairfax
Reston
Ellicott City
Oxon Hill
Gaithersburg
Arlington
Herndon
Manassas
Fredericksburg
Alexandria
Rockville

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Top 4 airlines flying from Niagara Falls to Dulles Intl

Discover the top 4 airlines that operate flights from Niagara Falls to Dulles Intl. 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 629,999 searches. Data last updated 29 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Air TransatCheapestC$ 211AverageC$ 521FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Porter AirlinesCheapestC$ 213AverageC$ 288FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
United AirlinesCheapestC$ 262AverageC$ 400FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 280AverageC$ 425FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Niagara Falls to Dulles Intl?

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Why should you use Cheapflights to find cheap flight tickets from Niagara Falls to Dulles Intl?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Niagara Falls to Dulles Intl.

Can Cheapflights find flights from Niagara Falls to Dulles Intl with no change fees?

Yes! Cheapflights helps users easily find flights from Niagara Falls to Dulles Intl with no change fees.

Can Cheapflights notify me if prices for flights from Niagara Falls to Dulles Intl become cheaper?

Of course! You can now track prices for flights from Niagara Falls to Dulles Intl and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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