In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 2.6 in.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, 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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

What is the cheapest month to fly from Springfield, Illinois to Washington, D.C. Dulles Intl Airport?

December is one of the best times of the year to fly to Washington, D.C. Dulles Intl Airport from Springfield, Illinois. Prices for December average $420 per person but you can even find prices for as low as $250. The most expensive prices can be found in the month of June. Opting for a December flight can save you 58% on your journey compared to booking in June

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Springfield, Illinois to Washington, D.C. Dulles Intl Airport as you normally would.

What airport do you fly from for flights from Springfield to Washington, D.C. Dulles Intl?

If you book a flight to Washington, D.C. Dulles Intl from Springfield, you will be flying from Capital, which is the city’s only airport. Springfield Capital (SPI) is located 3.4 mi from the center of Springfield. There are 0 flights from Capital to Washington, D.C. Dulles Intl per day from 0 different airlines.

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

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

How can I find direct flights from Springfield to Dulles Intl?

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

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

Yes. Cheapflights offers flight deals from Springfield 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.

$431+ Flights from Springfield, IL to Washington, D.C. Dulles Intl Airport

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Cheap flight deals from Springfield to Dulles Intl

Round-trip from	$431 (American Airlines)
Popular in	June
Cheapest in	December
Average price	$288

From Springfield Capital to Washington, D.C. Dulles Intl

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Highest demand for flights based on searches. 8% potential increase in price ($40 potential increase over avg. RT price).

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Cheapest flight prices on average. 5% potential price decrease ($23 potential savings vs. average RT price).

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Average for round-trip flights in September 2025

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Find flight deals from Springfield to Dulles Intl

Cheapest flights from Springfield to Dulles Intl
Explore the most affordable flight options available from Springfield to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 11, 2025.

sáb. 10/252:07 pmSPI - IAD

2 stops8h 46mAmerican Airlines

lun. 10/275:41 pmIAD - SPI

2 stops6h 42mAmerican Airlines

Deal found 9/10

$431

jue. 9/251:14 pmSPI - IAD

2 stops22h 04mAmerican Airlines

lun. 9/297:21 pmIAD - SPI

2 stops23h 39mAmerican Airlines

Deal found 9/10

$665

Best flights from Springfield to Dulles Intl
Discover carefully curated flight deals from Springfield to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated septiembre 11, 2025.

sáb. 10/252:07 pmSPI - IAD

2 stops8h 46mAmerican Airlines

lun. 10/275:41 pmIAD - SPI

2 stops6h 42mAmerican Airlines

Deal found 9/10

$431

mié. 2/186:00 amSPI - IAD

2 stops8h 58mAmerican Airlines

sáb. 2/218:52 amIAD - SPI

2 stops9h 44mAmerican Airlines

Deal found 9/9

$487

jue. 9/251:14 pmSPI - IAD

2 stops22h 04mAmerican Airlines

lun. 9/297:21 pmIAD - SPI

2 stops23h 39mAmerican Airlines

Deal found 9/10

$665

Last-minute flights from Springfield to Dulles Intl
Discover last-minute flight deals from Springfield to Dulles Intl. Data last updated septiembre 11, 2025 and is based on user searches.

jue. 9/251:14 pmSPI - IAD

2 stops22h 04mAmerican Airlines

lun. 9/297:21 pmIAD - SPI

2 stops23h 39mAmerican Airlines

Deal found 9/10

$665

sáb. 10/252:07 pmSPI - IAD

2 stops8h 46mAmerican Airlines

lun. 10/275:41 pmIAD - SPI

2 stops6h 42mAmerican Airlines

Deal found 9/10

$431

One-way flights from Springfield to Dulles Intl
Search for one-way flight options from Springfield to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated septiembre 11, 2025.

lun. 11/103:35 pmSPI - IAD

2 stops6h 32mAmerican Airlines

Deal found 9/10

$486

Cheapflights Fare Finder

Use the filters below to find and compare flights from Springfield to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SpringfieldWashington, D.C.

SPI - IAD

SPIIAD

Springfield Capital

sáb. 10/25

2:07 pm-11:53 pm

2 stops8h 46m

Washington, D.C. Dulles Intl

lun. 10/27

5:41 pm-11:23 pm

2 stops6h 42m

$431

SpringfieldWashington, D.C.

SPI - IAD

SPIIAD

Springfield Capital

mié. 2/18

6:00 am-3:58 pm

2 stops8h 58m

Washington, D.C. Dulles Intl

sáb. 2/21

8:52 am-5:36 pm

2 stops9h 44m

$487

SpringfieldWashington, D.C.

SPI - IAD

SPIIAD

Springfield Capital

jue. 9/25

1:14 pm-12:18 pm

2 stops22h 04m

Washington, D.C. Dulles Intl

lun. 9/29

7:21 pm-6:00 pm

2 stops23h 39m

$665

SpringfieldWashington, D.C.

SPI - IAD

SPIIAD

Springfield Capital

lun. 11/10

3:35 pm-11:07 pm

2 stops6h 32m

$486

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Best time to book a flight from Springfield to Dulles Intl

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

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

Currently, August is the cheapest month in which you can book a flight from Springfield, Illinois to Washington, D.C. Dulles Intl Airport (average of $292). Flying from Springfield, Illinois to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). 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.

Related info for your journey

What airport do you fly from for flights from Springfield to Washington, D.C. Dulles Intl?
If you book a flight to Washington, D.C. Dulles Intl from Springfield, you will be flying from Capital, which is the city’s only airport. Springfield Capital (SPI) is located 3.4 mi from the center of Springfield. There are 0 flights from Capital to Washington, D.C. Dulles Intl per day from 0 different airlines.
How long is the flight from Springfield, Illinois to Washington, D.C. Dulles Intl Airport?
Departing from Springfield, Illinois to Washington, D.C. Dulles Intl Airport will take you 8h 46m. Airlines will cover a distance of 655 mi.
Can I find deals for flights from Springfield to Dulles Intl that include hotel bookings?
Yes. In addition to deals on Springfield to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Springfield to Dulles Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Springfield to Dulles Intl.
Can I find deals for business class flights from Springfield to Dulles Intl?
Yes. Cheapflights offers flight deals from Springfield 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 Springfield, Illinois to Washington, D.C. Dulles Intl Airport?
Currently, August is the cheapest month in which you can book a flight from Springfield, Illinois to Washington, D.C. Dulles Intl Airport (average of $292). Flying from Springfield, Illinois to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). 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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$431+ Cheap flights from Springfield, IL (SPI) to Dulles Intl (IAD)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/25. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Springfield to Dulles Intl with Cheapflights

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Cheap flight deals from Springfield to Dulles Intl

Round-trip from

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Find flight deals from Springfield to Dulles Intl

Cheapest flights from Springfield to Dulles IntlExplore the most affordable flight options available from Springfield to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 11, 2025.

Explore the most affordable flight options available from Springfield to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 11, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Springfield to Washington, D.C. Dulles Intl Airport that are best for you.

Best time to book a flight from Springfield to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Springfield with our price prediction graph.

Cheapflights Insights

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

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

Related info for your journey

Find useful and relevant information for your journey from Springfield to Dulles Intl. 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 from for flights from Springfield to Washington, D.C. Dulles Intl?

How long is the flight from Springfield, Illinois to Washington, D.C. Dulles Intl Airport?

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

How can I find direct flights from Springfield to Dulles Intl?

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

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

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

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Alternative routes for Springfield to Dulles Intl

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Cheapest flights from Springfield to Dulles Intl
Explore the most affordable flight options available from Springfield to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 11, 2025.