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

The most flights from IAD to NI4 are scheduled on a Monday (19 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (16 on average).

In terms of precipitation, rainfall in Niagara Falls ranges from 2.0 - 3.3 inches per month. June is typically the wettest month, when rainfall can reach 3.3 in. February is typically the driest time to visit Niagara Falls when rainfall is around 2.0 in.

If weather is an important factor for your trip to Niagara Falls, 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 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 21.2 F).

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

Looking for the cheapest flight from Washington, D.C. Dulles Intl Airport to Niagara Falls? While on average our users pay $2,358, our data indicates the cheapest price to be $76. The most popular route (Washington, D.C. Dulles Intl - Toronto Pearson Intl), is priced around $248.

What are the most popular airlines that fly from Washington, D.C. Dulles Intl Airport to Niagara Falls?

The most popular airlines flying from Washington, D.C. Dulles Intl Airport to Niagara Falls are Air Canada, United Airlines and Delta. Something to consider prior to booking your flight.

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

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

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

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

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

Yes. Cheapflights offers flight deals from Dulles Intl to Niagara Falls by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Find Cheap Flights from Washington, D.C. Dulles Intl Airport to Niagara Falls

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from Dulles Intl to Niagara Falls with Cheapflights

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.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Niagara Falls are usually found in January or December, booked 81 days in advance, depart on a Thursday or Wednesday and return on a Friday

Find flight deals from Dulles Intl to Niagara Falls

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Popular in	June
Cheapest in	January
Average price	$385

Provider with most accurate pricing for Washington, D.C. (WAS)-Toronto (YTO) flight deals.

Search Deals

Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Toronto (YTO) flights.

Search Deals

Highest demand for flights based on searches. 5% potential increase in price ($19 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in September 2026

Search Deals

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Dulles Intl Airport to Niagara Falls

Prices

Airlines

What is the cheapest time of day to fly from IAD to NI4?

A simple way to save on the total cost of your ticket is to fly from Washington, D.C. Dulles Intl Airport to Niagara Falls at noon. If you’re flexible enough to do this you can expect to save up to 8% on your trip compared to booking a flight in the morning.

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

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

Reviews of airlines servicing Niagara Falls

Get a feel of what it's like to fly with Porter Airlines,Delta, andUnited Airlines from Washington, D.C. Dulles Intl Airport to Niagara Falls by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Porter Airlines

8.0

Very good

465 reviews

Reviews

1 / 20

6.0

Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats

Porter Airlines

8.0

Very good

465 reviews

Porter Airlines

8.0

Very good

465 reviews

Reviews

1 / 20

6.0

Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats

Delta

7.8

Good

8,609 reviews

Porter Airlines

8.0

Very good

465 reviews

Reviews

1 / 20

6.0

Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats

United Airlines

7.4

Good

10,250 reviews

Porter Airlines

8.0

Very good

465 reviews

Reviews

1 / 20

6.0

Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats

Air Canada

7.1

Good

11,703 reviews

Porter Airlines

8.0

Very good

465 reviews

Reviews

1 / 20

6.0

Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats

Related info for your journey

What are the most reliable airlines from Washington, D.C. Dulles Intl Airport to Niagara Falls?
The top 3 most reliable airlines when flying from Washington, D.C. Dulles Intl Airport to Niagara Falls are ANA (77%), Copa Airlines (71%) and Republic Airways (71%).
What are the cheapest flights from Washington, D.C. Dulles Intl Airport to Niagara Falls?
Looking for the cheapest flight from Washington, D.C. Dulles Intl Airport to Niagara Falls? While on average our users pay $2,358, our data indicates the cheapest price to be $76. The most popular route (Washington, D.C. Dulles Intl - Toronto Pearson Intl), is priced around $248.
Can I find deals for flights from Dulles Intl to Niagara Falls that include hotel bookings?
Yes. In addition to deals on Dulles Intl to Niagara Falls flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Dulles Intl to Niagara Falls?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Niagara Falls.
Can I find deals for business class flights from Dulles Intl to Niagara Falls?
Yes. Cheapflights offers flight deals from Dulles Intl to Niagara Falls by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Alternative routes

Complete your trip

Flights by cabin class

Other flight options

Other flights from Dulles Intl

Popular flights

Top destinations

Alternative routes for Dulles Intl to Niagara Falls

Reagan-National to Pearson Intl flights

Dulles Intl to Pearson Intl flights

Reagan-National to Pierre Elliott Trudeau Intl flights

Dulles Intl to Toronto Island flights

Baltimore to Pearson Intl flights

Reagan-National to Ottawa flights

Dulles Intl to Ottawa flights

Baltimore to Ottawa flights

Reagan-National to London flights

Baltimore to London flights

Baltimore to Windsor flights

Baltimore to Kingston flights

Top 5 airlines flying from Dulles Intl to Niagara Falls

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$106	Average$254	FlexibilityNo cancel fee	On-timeN/A
Air Canada	Cheapest$116	Average$330	FlexibilityNo cancel fee	On-time67%
Porter Airlines	Cheapest$128	Average$242	FlexibilityNo cancel fee	On-time52%
United Airlines	Cheapest$246	Average$424	FlexibilityNo cancel fee	On-time69%
Air Transat	Cheapest$263	Average$527	FlexibilityNo cancel fee	On-time50%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from Dulles Intl (IAD) to Niagara Falls, Canada

Find cheap flights from Dulles Intl to Niagara Falls with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Find flight deals from Dulles Intl to Niagara Falls

Most accurate provider

Most trusted provider

Popular in

Cheapest in

Average price

Cheapflights Insights

What is the cheapest time of day to fly from IAD to NI4?

A simple way to save on the total cost of your ticket is to fly from Washington, D.C. Dulles Intl Airport to Niagara Falls at noon. If you’re flexible enough to do this you can expect to save up to 8% on your trip compared to booking a flight in the morning.

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

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

The most flights from IAD to NI4 are scheduled on a Monday (19 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (16 on average).

Reviews of airlines servicing Niagara Falls

Get a feel of what it's like to fly with Porter Airlines,Delta, andUnited Airlines from Washington, D.C. Dulles Intl Airport to Niagara Falls by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

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

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

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

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Dulles Intl to Niagara Falls

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

Complete your trip

Complete your trip to Niagara Falls by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Dulles Intl to Niagara Falls by cabin class

Find flights from Dulles Intl to Niagara Falls, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Dulles Intl and Niagara Falls flights

Browse other Dulles Intl and Niagara Falls flight options. Last updated on September 29, 2026.

Other flights from Dulles Intl

Browse through other flights departing from Dulles Intl. Flights are based on user searches made on Cheapflights and were last updated on September 29, 2026.

Popular flight searches

Check out other popular destinations found by fellow travelers in 2026

Dulles Intl to Niagara Falls flights

Consider these flights traveling from Dulles Intl to Niagara Falls.

Top 5 airlines flying from Dulles Intl to Niagara Falls

100% Free

Book with Flexibility

Travel Smart