What are the cheapest airlines to fly from Illinois to Washington, D.C. Dulles Intl Airport one-way?

To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $89. United Airlines flights start at $90 while deals on Allegiant Air start at $96 one-way.

What are the most popular routes from Illinois to Washington, D.C. Dulles Intl Airport?

The most popular flight routes from Illinois to Washington, D.C. Dulles Intl Airport are Chicago O'Hare Intl - Washington, D.C. Dulles Intl, Chicago Midway - Washington, D.C. Dulles Intl and Lambert-St Louis - Washington, D.C. Dulles Intl.

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

The cheapest flight price from Illinois to Washington, D.C. Dulles Intl Airport is $114. On average you can expect to pay $2,079. The most popular route, (Chicago O'Hare Intl - Washington, D.C. Dulles Intl), can usually be booked for $157.

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

Before booking your flight from Illinois to Washington, D.C. Dulles Intl Airport check out the most popular airlines for this route: Delta, Frontier or United Airlines.

How far in advance should I book a flight from Illinois to Washington, D.C. Dulles Intl Airport?

Users have found that booking a flight from Illinois to Washington, D.C. Dulles Intl Airport at least 42 days early can save you up to 77% on average compared to booking a flight this week. If booking 42 days before your flight isn’t an option for you, users have found flights from Illinois to Washington, D.C. Dulles Intl Airport for as little as $232 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $380 for flights departing within the next 3 days.

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

Our data shows that September tends to be the cheapest month to fly to Washington, D.C. Dulles Intl Airport from Illinois. Users have commonly found prices around $228 for the month, but tickets can be as low as $62. Due to multiple factors, prepare for potentially higher prices in January.

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

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

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

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

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

Yes. Cheapflights offers flight deals from Illinois 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.

$89+ Flights from Illinois to Washington, D.C. Dulles Intl Airport

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Cheap flight deals from Illinois to Dulles Intl

Round-trip from	$157 (United Airlines)
One-way from	$89 (Frontier)
Popular in	January
Cheapest in	September
Average price	$234
Good round-trip deal	$441 or less
Good one-way deal	$149 or less

From Illinois to Washington, D.C. Dulles Intl

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One-way flight from Illinois to Washington, D.C. Dulles Intl

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Highest demand for flights based on searches. 3% potential increase in price ($9 potential increase over avg. RT price).

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Cheapest flight prices on average. 0% potential price decrease ($2 potential savings vs. average RT price).

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Average for round-trip flights in June 2025

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Price to beat on a round-trip flight from Illinois to Washington, D.C. Dulles Intl.

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Price to beat on a one-way flight from Illinois to Washington, D.C. Dulles Intl.

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Find flight deals from Illinois to Dulles Intl

Cheapest flights from Illinois to Dulles Intl
Explore the most affordable flight options available from Illinois to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

Thu 8/149:31 pmORD - IAD

Nonstop1h 59mUnited Airlines

Mon 8/1810:19 pmIAD - ORD

Nonstop2h 11mUnited Airlines

Deal found 6/11

$157

Sat 9/205:45 pmORD - IAD

1 stop5h 10mFrontier

Thu 9/258:06 pmIAD - ORD

1 stop17h 51mFrontier

Deal found 6/10

$171

Fri 8/225:50 pmORD - IAD

1 stop18h 14mMultiple Airlines

Sun 8/244:56 pmIAD - ORD

1 stop24h 52mMultiple Airlines

Deal found 6/10

$178

Tue 8/56:20 pmMDW - IAD

1 stop3h 35mDelta

Wed 8/139:50 amIAD - MDW

1 stop3h 38mDelta

Deal found 6/10

$197

Wed 9/246:00 amORD - IAD

1 stop4h 57mDelta

Tue 9/306:00 amIAD - ORD

1 stop5h 03mDelta

Deal found 6/10

$197

Fri 7/119:12 amMDW - IAD

1 stop27h 43mAllegiant Air

Sun 7/203:53 pmIAD - MDW

1 stop16h 20mAllegiant Air

Deal found 6/11

$204

Wed 11/57:20 amSTL - IAD

1 stop5h 37mDelta

Sat 11/86:10 amIAD - STL

1 stop4h 25mDelta

Deal found 6/10

$208

Sat 7/196:20 amMDW - IAD

1 stop7h 56mFrontier

Wed 7/236:10 amIAD - MDW

1 stop5h 30mFrontier

Deal found 6/12

$211

Wed 9/249:17 amSTL - IAD

1 stop5h 35mUnited Airlines

Fri 9/266:30 amIAD - STL

1 stop5h 19mUnited Airlines

Deal found 6/12

$213

Sat 7/122:52 pmSTL - IAD

1 stop7h 27mFrontier

Sat 7/196:10 amIAD - STL

1 stop8h 49mFrontier

Deal found 6/11

$226

Tue 7/811:50 amORD - IAD

1 stop22h 53mSun Country Air

Sat 7/1212:40 pmIAD - ORD

1 stop5h 29mSun Country Air

Deal found 6/10

$245

Wed 8/64:15 pmPIA - IAD

1 stop5h 41mAmerican Airlines

Wed 8/1310:25 amIAD - PIA

1 stop7h 07mAmerican Airlines

Deal found 6/10

$249

Best flights from Illinois to Dulles Intl
Discover carefully curated flight deals from Illinois to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 12, 2025.

Thu 8/148:52 amORD - IAD

Nonstop2h 03mUnited Airlines

Mon 8/1810:19 pmIAD - ORD

Nonstop2h 11mUnited Airlines

Deal found 6/11

$157

Fri 8/225:50 pmORD - IAD

1 stop18h 14mMultiple Airlines

Sun 8/244:56 pmIAD - ORD

1 stop24h 52mMultiple Airlines

Deal found 6/10

$178

Tue 8/56:20 pmMDW - IAD

1 stop3h 35mDelta

Wed 8/139:50 amIAD - MDW

1 stop3h 38mDelta

Deal found 6/10

$197

Fri 7/119:12 amMDW - IAD

1 stop27h 43mAllegiant Air

Sun 7/203:53 pmIAD - MDW

1 stop16h 20mAllegiant Air

Deal found 6/11

$204

Wed 7/1611:39 amMDW - IAD

1 stop11h 33mFrontier

Wed 7/236:10 amIAD - MDW

1 stop5h 30mFrontier

Deal found 6/11

$214

Fri 7/116:15 pmORD - IAD

1 stop16h 28mSun Country Air

Mon 7/1412:46 pmIAD - ORD

1 stop5h 35mSun Country Air

Deal found 6/11

$245

Wed 8/64:15 pmPIA - IAD

1 stop5h 41mAmerican Airlines

Wed 8/1310:25 amIAD - PIA

1 stop7h 07mAmerican Airlines

Deal found 6/10

$249

Sun 8/177:20 amSTL - IAD

1 stop7h 00mSouthwest

Wed 8/205:45 amIAD - STL

1 stop6h 45mSouthwest

Deal found 6/10

$257

Wed 8/67:10 amORD - IAD

1 stop3h 22mDelta

Tue 8/127:22 amIAD - ORD

1 stop5h 54mDelta

Deal found 6/10

$197

Wed 9/249:17 amSTL - IAD

1 stop5h 35mUnited Airlines

Fri 9/266:30 amIAD - STL

1 stop5h 19mUnited Airlines

Deal found 6/12

$213

Sat 7/122:52 pmSTL - IAD

1 stop7h 27mFrontier

Sat 7/196:10 amIAD - STL

1 stop8h 49mFrontier

Deal found 6/11

$226

Sat 8/167:00 amSTL - IAD

1 stop6h 31mDelta

Thu 8/216:00 amIAD - STL

1 stop4h 57mDelta

Deal found 6/11

$208

Last-minute flights from Illinois to Dulles Intl
Discover last-minute flight deals from Illinois to Dulles Intl. Data last updated June 12, 2025 and is based on user searches.

Tue 6/175:38 pmORD - IAD

1 stop5h 26mFrontier

Tue 6/246:10 amIAD - ORD

1 stop11h 24mFrontier

Deal found 6/9

$260

Wed 6/185:38 pmORD - IAD

1 stop5h 26mMultiple Airlines

Wed 6/2512:40 pmIAD - ORD

1 stop8h 07mMultiple Airlines

Deal found 6/10

$330

Thu 6/192:55 pmMDW - IAD

1 stop8h 09mFrontier

Thu 6/261:29 pmIAD - MDW

1 stop7h 48mFrontier

Deal found 6/12

$239

Thu 6/198:44 pmSTL - IAD

1 stop12h 25mFrontier

Sat 6/216:10 amIAD - STL

1 stop8h 57mFrontier

Deal found 6/11

$304

Thu 6/196:45 amPIA - IAD

1 stop6h 43mUnited Airlines

Tue 6/246:48 amIAD - PIA

1 stop4h 33mUnited Airlines

Deal found 6/10

$354

Thu 6/198:52 amORD - IAD

Nonstop2h 03mUnited Airlines

Fri 7/45:13 pmIAD - ORD

Nonstop2h 27mUnited Airlines

Deal found 6/9

$354

Thu 6/195:35 pmMLI - IAD

1 stop5h 55mUnited Airlines

Sat 6/283:39 pmIAD - MLI

1 stop6h 58mUnited Airlines

Deal found 6/10

$394

Thu 6/198:15 amSTL - IAD

Nonstop2h 08mUnited Airlines

Thu 6/266:35 amIAD - STL

1 stop6h 52mUnited Airlines

Deal found 6/12

$459

Fri 6/209:12 amMDW - IAD

1 stop27h 43mAllegiant Air

Sun 6/223:58 pmIAD - MDW

1 stop16h 17mAllegiant Air

Deal found 6/12

$344

Fri 6/209:50 pmPIA - IAD

1 stop22h 02mMultiple Airlines

Sun 6/2212:55 pmIAD - PIA

3 stops27h 03mMultiple Airlines

Deal found 6/11

$378

Fri 6/209:50 pmPIA - IAD

1 stop22h 02mAllegiant Air

Sun 6/229:21 amIAD - PIA

1 stop23h 23mAllegiant Air

Deal found 6/11

$425

Sat 6/213:50 pmBMI - IAD

1 stop6h 29mDelta

Tue 6/245:29 pmIAD - BMI

1 stop6h 17mDelta

Deal found 6/10

$460

One-way flights from Illinois to Dulles Intl
Search for one-way flight options from Illinois to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated June 12, 2025.

Wed 8/278:00 amMDW - IAD

1 stop5h 56mFrontier

Deal found 6/10

$89

Tue 7/110:50 amORD - IAD

Nonstop1h 59mUnited Airlines

Deal found 6/10

$90

Fri 8/84:37 pmORD - IAD

1 stop20h 35mMultiple Airlines

Deal found 6/11

$91

Mon 8/259:32 amMDW - IAD

1 stop4h 51mAllegiant Air

Deal found 6/10

$96

Fri 8/19:06 pmPIA - IAD

1 stop22h 52mAllegiant Air

Deal found 6/10

$99

Mon 8/1812:43 pmMDW - IAD

1 stop4h 52mDelta

Deal found 6/10

$99

Tue 10/147:10 amORD - IAD

1 stop5h 47mDelta

Deal found 6/10

$99

Mon 9/810:25 amORD - IAD

1 stop4h 48mFrontier

Deal found 6/9

$102

Tue 7/298:15 amSTL - IAD

Nonstop2h 08mUnited Airlines

Deal found 6/10

$115

Thu 10/237:45 pmORD - IAD

1 stop15h 05mSun Country Air

Deal found 6/10

$123

Sat 11/110:50 amMLI - IAD

1 stop4h 05mUnited Airlines

Deal found 6/12

$126

Wed 7/27:05 amORD - IAD

1 stop4h 33mAmerican Airlines

Deal found 6/11

$135

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

ChicagoWashington, D.C.

ORD - IAD

ORDIAD

Chicago O'Hare Intl

Thu 8/14

9:31 pm-12:30 am

Nonstop1h 59m

Washington, D.C. Dulles Intl

Mon 8/18

10:19 pm-11:30 pm

Nonstop2h 11m

$157

ChicagoWashington, D.C.

ORD - IAD

ORDIAD

Chicago O'Hare Intl

Fri 8/22

5:50 pm-1:04 pm

1 stop18h 14m

Washington, D.C. Dulles Intl

Sun 8/24

4:56 pm-4:48 pm

1 stop24h 52m

$178

ChicagoWashington, D.C.

MDW - IAD

MDWIAD

Chicago Midway

Tue 8/5

6:20 pm-10:55 pm

1 stop3h 35m

Washington, D.C. Dulles Intl

Wed 8/13

9:50 am-12:28 pm

1 stop3h 38m

$197

ChicagoWashington, D.C.

ORD - IAD

ORDIAD

Chicago O'Hare Intl

Wed 8/6

7:10 am-11:32 am

1 stop3h 22m

Washington, D.C. Dulles Intl

Tue 8/12

7:22 am-12:16 pm

1 stop5h 54m

$197

ChicagoWashington, D.C.

MDW - IAD

MDWIAD

Chicago Midway

Fri 7/11

9:12 am-1:55 pm

1 stop27h 43m

Washington, D.C. Dulles Intl

Sun 7/20

3:53 pm-7:13 am

1 stop16h 20m

$204

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Wed 11/5

7:20 am-1:57 pm

1 stop5h 37m

Washington, D.C. Dulles Intl

Sat 11/8

6:10 am-9:35 am

1 stop4h 25m

$208

ChicagoWashington, D.C.

MDW - IAD

MDWIAD

Chicago Midway

Sat 7/19

6:20 am-3:16 pm

1 stop7h 56m

Washington, D.C. Dulles Intl

Wed 7/23

6:10 am-10:40 am

1 stop5h 30m

$211

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Wed 9/24

9:17 am-3:52 pm

1 stop5h 35m

Washington, D.C. Dulles Intl

Fri 9/26

6:30 am-10:49 am

1 stop5h 19m

$213

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Sat 7/12

2:52 pm-11:19 pm

1 stop7h 27m

Washington, D.C. Dulles Intl

Sat 7/19

6:10 am-1:59 pm

1 stop8h 49m

$226

ChicagoWashington, D.C.

ORD - IAD

ORDIAD

Chicago O'Hare Intl

Tue 7/8

11:50 am-11:43 am

1 stop22h 53m

Washington, D.C. Dulles Intl

Sat 7/12

12:40 pm-5:09 pm

1 stop5h 29m

$245

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 57 results

...

Best time to book a flight from Illinois to Dulles Intl

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

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

Currently, August is the cheapest month in which you can book a flight from Illinois to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Illinois to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $349). 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 IL to IAD?

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

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

The most flights from USIL to IAD are scheduled on a Thursday (29 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (19 on average).

Rainfall in Dulles Intl by month

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.

Temperature in Dulles Intl by month

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).

Reviews of airlines servicing Dulles Intl

See what other customers who have flown with Alaska Airlines, Southwest and Delta from Illinois to Washington, D.C. have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Alaska Airlines

8.0

Very good

10,000 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Southwest

8.0

Very good

4,287 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Delta

8.0

Very good

7,946 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

United Airlines

7.4

Good

8,790 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Allegiant Air

7.3

Good

725 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Related info for your journey

What are the cheapest airlines to fly from Illinois to Washington, D.C. Dulles Intl Airport one-way?
To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $89. United Airlines flights start at $90 while deals on Allegiant Air start at $96 one-way.
What are the most popular routes from Illinois to Washington, D.C. Dulles Intl Airport?
The most popular flight routes from Illinois to Washington, D.C. Dulles Intl Airport are Chicago O'Hare Intl - Washington, D.C. Dulles Intl, Chicago Midway - Washington, D.C. Dulles Intl and Lambert-St Louis - Washington, D.C. Dulles Intl.
What are the most reliable airlines from Illinois to Washington, D.C. Dulles Intl Airport?
The top 3 most reliable airlines when flying from Illinois to Washington, D.C. Dulles Intl Airport are Austrian Airlines (95%), Air China (94%) and Avianca (89%).
What are the cheapest flights from Illinois to Washington, D.C. Dulles Intl Airport?
The cheapest flight price from Illinois to Washington, D.C. Dulles Intl Airport is $114. On average you can expect to pay $2,079. The most popular route, (Chicago O'Hare Intl - Washington, D.C. Dulles Intl), can usually be booked for $157.
Can I find deals for flights from Illinois to Dulles Intl that include hotel bookings?
Yes. In addition to deals on Illinois to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Illinois to Dulles Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Dulles Intl.
Can I find deals for business class flights from Illinois to Dulles Intl?
Yes. Cheapflights offers flight deals from Illinois 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 Illinois to Washington, D.C. Dulles Intl Airport?
Currently, August is the cheapest month in which you can book a flight from Illinois to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Illinois to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $349). 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

Arlington

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Woodbridge

Tysons

Silver Spring

Linthicum Heights

Fredericksburg

Gaithersburg

Fairfax

Falls Church

Easton

Herndon

Towson

Sterling

Bowie

Rockville

Reston

National Harbor

Springfield

Manassas

Browse thousands of different options on Cheapflights for your next trip

Top 4 airlines flying from Illinois to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$54	Average$191	FlexibilityNo cancel fee	On-time62%
Delta	Cheapest$176	Average$422	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$179	Average$385	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$258	Average$303	FlexibilityNo cancel fee	On-time71%

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$89+ Cheap flights from Illinois to Dulles Intl (IAD)

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 8/27. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Illinois to Dulles Intl with Cheapflights

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Cheap flight deals from Illinois to Dulles Intl

Keep the following information in mind while searching for Illinois to Dulles Intl flight deals. Data was last updated June 12, 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Illinois to Dulles Intl

Cheapest flights from Illinois to Dulles IntlExplore the most affordable flight options available from Illinois to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

Explore the most affordable flight options available from Illinois to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

Cheapflights Fare Finder

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

Best time to book a flight from Illinois to Dulles Intl

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

Cheapflights Insights

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

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

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

Find hourly flight availability from Illinois 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 June 12, 2025.

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

Explore weekly flight availability from Illinois 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 June 12, 2025.

Rainfall in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average rainfall totals by month.

Temperature in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average temperature totals by month.

Reviews of airlines servicing Dulles Intl

See what other customers who have flown with Alaska Airlines, Southwest and Delta from Illinois to Washington, D.C. have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Illinois 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 are the cheapest airlines to fly from Illinois to Washington, D.C. Dulles Intl Airport one-way?

What are the most popular routes from Illinois to Washington, D.C. Dulles Intl Airport?

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

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

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

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

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

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

Traveling to a place near Illinois?

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Alternative routes for Illinois to Dulles Intl

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

Top 4 airlines flying from Illinois to Dulles Intl

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Cheapest flights from Illinois to Dulles Intl
Explore the most affordable flight options available from Illinois to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.