What are the cheapest airlines flying from Chicago to Washington, D.C. Dulles Intl Airport round-trip?

Flying on Frontier is currently your cheapest option to Washington, D.C. Dulles Intl Airport, with prices starting at $153. Additional round-trip tickets that might be worth considering are offered by United Airlines and Delta, with the lowest prices starting at $157 and $197, respectively. Frontier is 49% cheaper than the average price of flights available within the next 90 days to this destination.

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

$87 is the cheapest one-way deal found within the past few days, from Allegiant Air. You may also be able to find cheap deals on United Airlines and Frontier, with prices starting from $90 and $94, respectively.

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

Looking at all options, your cheapest flight can be booked for $113. While the most popular route (Chicago O'Hare Intl - Washington, D.C. Dulles Intl) can be booked for $157 on average our data indicates $1,359 when flying from Chicago to Washington, D.C. Dulles Intl Airport.

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

The top 3 most reliable airlines when flying from Chicago to Washington, D.C. Dulles Intl Airport are Sun Country Air (100%), Air China (94%) and Austrian Airlines (89%).

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

Delta, Frontier and United Airlines are the most popular airlines when flying from Chicago to Washington, D.C. Dulles Intl Airport.

What is the cheapest day to fly round-trip from Chicago to Washington, D.C. Dulles Intl Airport?

Thursday is generally a great day to depart. Flying on this day could help you save up to 42%.

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

Flights from Chicago to Washington, D.C. Dulles Intl Airport lean towards being more expensive in January. Prices are generally better when you fly from Chicago to Washington, D.C. Dulles Intl Airport in September, with the cheapest ticket starting at $62.

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

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

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

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

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

Yes. Cheapflights offers flight deals from Chicago 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.

$87+ Flights from Chicago to Washington, D.C. Dulles Intl Airport

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Cheapflights Tip: The best prices from Chicago to Washington, D.C. Dulles Intl are usually found in August or May, booked 27 days in advance, depart on a Friday or Wednesday and return on a Friday

Cheap flight deals from Chicago to Dulles Intl

Round-trip from	$153 (Frontier)
One-way from	$87 (Mytrip)
Popular in	December
Cheapest in	August
Average price	$333
Good round-trip deal	$420 or less
Good one-way deal	$183 or less

From Chicago (CHI) to Washington, D.C. Dulles Intl

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One-way flight from Chicago (CHI) to Washington, D.C. Dulles Intl

Search Deals

Highest demand for flights based on searches. 8% potential increase in price ($28 potential increase over avg. RT price).

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Cheapest flight prices on average. 2% potential price decrease ($7 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 Chicago (CHI) to Washington, D.C. Dulles Intl.

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Price to beat on a one-way flight from Chicago (CHI) to Washington, D.C. Dulles Intl.

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Find flight deals from Chicago to Dulles Intl

Cheapest flights from Chicago to Dulles Intl
Explore the most affordable flight options available from Chicago to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 26, 2025.

Tue 8/122:24 pmORD - IAD

Nonstop2h 06mUnited Airlines

Tue 8/1210:19 pmIAD - ORD

Nonstop2h 11mUnited Airlines

Deal found 6/26

$157

Fri 8/227:46 pmORD - IAD

1 stop24h 02mFrontier

Sun 8/245:18 pmIAD - ORD

1 stop7h 36mFrontier

Deal found 6/26

$165

Tue 9/96:17 pmMDW - IAD

1 stop3h 38mDelta

Wed 9/106:00 amIAD - MDW

1 stop3h 35mDelta

Deal found 6/24

$197

Thu 9/49:45 amORD - IAD

1 stop5h 45mDelta

Tue 9/96:00 amIAD - ORD

1 stop5h 20mDelta

Deal found 6/26

$197

Fri 8/225:15 pmORD - IAD

2 stops18h 49mMultiple Airlines

Sun 8/244:56 pmIAD - ORD

2 stops18h 18mMultiple Airlines

Deal found 6/25

$210

Fri 7/46:20 amMDW - IAD

1 stop8h 09mFrontier

Tue 7/86:10 amIAD - MDW

1 stop5h 30mFrontier

Deal found 6/24

$226

Tue 7/2211:44 amORD - IAD

1 stop22h 59mSun Country Air

Fri 7/258:20 pmIAD - ORD

1 stop22h 07mSun Country Air

Deal found 6/25

$245

Sat 10/258:30 amORD - IAD

1 stop6h 30mAmerican Airlines

Mon 10/278:09 pmIAD - ORD

1 stop4h 48mAmerican Airlines

Deal found 6/25

$258

Sun 8/1011:07 amMDW - IAD

3 stops23h 13mMultiple Airlines

Sun 8/179:12 pmIAD - MDW

2 stops17h 52mMultiple Airlines

Deal found 6/26

$386

Wed 7/911:20 amMDW - IAD

2 stops10h 25mSouthwest

Thu 7/105:00 amIAD - MDW

1 stop9h 20mSouthwest

Deal found 6/24

$481

Best flights from Chicago to Dulles Intl
Discover carefully curated flight deals from Chicago to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 26, 2025.

Tue 7/2911:39 amMDW - IAD

1 stop11h 33mFrontier

Tue 8/56:10 amIAD - MDW

1 stop5h 30mFrontier

Deal found 6/26

$153

Tue 8/122:24 pmORD - IAD

Nonstop2h 06mUnited Airlines

Tue 8/1210:19 pmIAD - ORD

Nonstop2h 11mUnited Airlines

Deal found 6/26

$157

Wed 8/206:04 amMDW - IAD

1 stop4h 40mDelta

Thu 9/46:00 amIAD - MDW

1 stop3h 35mDelta

Deal found 6/26

$197

Fri 8/225:15 pmORD - IAD

2 stops18h 49mMultiple Airlines

Sun 8/244:56 pmIAD - ORD

2 stops18h 18mMultiple Airlines

Deal found 6/25

$210

Tue 7/2211:44 amORD - IAD

1 stop22h 59mSun Country Air

Fri 7/258:20 pmIAD - ORD

1 stop22h 07mSun Country Air

Deal found 6/25

$245

Sat 9/137:02 amORD - IAD

1 stop5h 49mAmerican Airlines

Sun 9/145:26 pmIAD - ORD

1 stop7h 13mAmerican Airlines

Deal found 6/25

$258

Fri 8/227:46 pmORD - IAD

1 stop24h 02mFrontier

Sun 8/245:18 pmIAD - ORD

1 stop7h 36mFrontier

Deal found 6/26

$165

Thu 9/47:05 amORD - IAD

1 stop6h 26mDelta

Tue 9/96:00 amIAD - ORD

1 stop5h 20mDelta

Deal found 6/25

$197

Sun 8/1011:07 amMDW - IAD

3 stops23h 13mMultiple Airlines

Sun 8/179:12 pmIAD - MDW

2 stops17h 52mMultiple Airlines

Deal found 6/26

$386

Last-minute flights from Chicago to Dulles Intl
Discover last-minute flight deals from Chicago to Dulles Intl. Data last updated June 26, 2025 and is based on user searches.

Tue 7/12:24 pmORD - IAD

Nonstop2h 06mUnited Airlines

Tue 7/293:39 pmIAD - ORD

Nonstop2h 13mUnited Airlines

Deal found 6/24

$204

Tue 7/11:31 pmORD - IAD

1 stop5h 19mDelta

Fri 7/41:00 pmIAD - ORD

1 stop4h 18mDelta

Deal found 6/24

$217

Fri 7/45:01 amORD - IAD

1 stop9h 28mFrontier

Sun 7/137:46 pmIAD - ORD

1 stop28h 45mFrontier

Deal found 6/26

$154

Fri 7/49:24 amMDW - IAD

1 stop6h 20mDelta

Sat 7/56:00 amIAD - MDW

1 stop6h 59mDelta

Deal found 6/24

$217

Fri 7/47:39 pmORD - IAD

2 stops24h 14mMultiple Airlines

Sat 7/1212:40 pmIAD - ORD

1 stop5h 29mMultiple Airlines

Deal found 6/25

$291

Fri 7/47:15 amORD - IAD

1 stop4h 23mAmerican Airlines

Tue 7/86:35 amIAD - ORD

2 stops6h 34mAmerican Airlines

Deal found 6/24

$490

Sat 7/56:20 amMDW - IAD

1 stop7h 56mFrontier

Sat 7/124:17 pmIAD - MDW

1 stop7h 18mFrontier

Deal found 6/26

$171

Tue 7/85:38 pmORD - IAD

1 stop5h 34mMultiple Airlines

Sat 7/2612:40 pmIAD - ORD

1 stop5h 47mMultiple Airlines

Deal found 6/24

$241

Wed 7/911:20 amMDW - IAD

2 stops10h 25mSouthwest

Thu 7/105:00 amIAD - MDW

1 stop9h 20mSouthwest

Deal found 6/24

$481

Thu 7/171:05 pmORD - IAD

Nonstop2h 05mUnited Airlines

Mon 8/43:39 pmIAD - ORD

Nonstop2h 13mUnited Airlines

Deal found 6/26

$193

Thu 7/1711:37 amMDW - IAD

3 stops22h 43mMultiple Airlines

Sun 7/2012:40 pmIAD - MDW

2 stops22h 01mMultiple Airlines

Deal found 6/25

$444

Tue 7/2211:44 amORD - IAD

1 stop22h 59mSun Country Air

Fri 7/258:20 pmIAD - ORD

1 stop22h 07mSun Country Air

Deal found 6/25

$245

One-way flights from Chicago to Dulles Intl
Search for one-way flight options from Chicago to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated June 26, 2025.

Fri 8/229:32 amMDW - IAD

1 stop4h 51mAllegiant Air

Deal found 6/25

$87

Tue 7/11:05 pmORD - IAD

Nonstop2h 05mUnited Airlines

Deal found 6/24

$90

Fri 8/227:46 pmORD - IAD

2 stops19h 44mFrontier

Deal found 6/26

$94

Tue 9/169:30 amMDW - IAD

1 stop6h 01mDelta

Deal found 6/25

$99

Wed 8/277:05 amORD - IAD

1 stop6h 26mDelta

Deal found 6/25

$99

Sat 8/25:38 pmORD - IAD

2 stops16h 30mMultiple Airlines

Deal found 6/25

$100

Thu 7/172:55 pmMDW - IAD

1 stop8h 17mFrontier

Deal found 6/26

$107

Fri 8/18:10 pmORD - IAD

1 stop14h 33mSun Country Air

Deal found 6/24

$122

Sun 9/215:00 amORD - IAD

1 stop5h 33mAmerican Airlines

Deal found 6/24

$133

Thu 7/3111:37 amMDW - IAD

3 stops22h 43mMultiple Airlines

Deal found 6/25

$244

Cheapflights Fare Finder

Use the filters below to find and compare flights from Chicago 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

Tue 8/12

2:24 pm-5:30 pm

Nonstop2h 06m

Washington, D.C. Dulles Intl

Tue 8/12

10:19 pm-11:30 pm

Nonstop2h 11m

$157

ChicagoWashington, D.C.

ORD - IAD

ORDIAD

Chicago O'Hare Intl

Fri 8/22

7:46 pm-8:48 pm

1 stop24h 02m

Washington, D.C. Dulles Intl

Sun 8/24

5:18 pm-11:54 pm

1 stop7h 36m

$165

ChicagoWashington, D.C.

MDW - IAD

MDWIAD

Chicago Midway

Tue 9/9

6:17 pm-10:55 pm

1 stop3h 38m

Washington, D.C. Dulles Intl

Wed 9/10

6:00 am-8:35 am

1 stop3h 35m

$197

ChicagoWashington, D.C.

ORD - IAD

ORDIAD

Chicago O'Hare Intl

Thu 9/4

9:45 am-4:30 pm

1 stop5h 45m

Washington, D.C. Dulles Intl

Tue 9/9

6:00 am-10:20 am

1 stop5h 20m

$197

ChicagoWashington, D.C.

ORD - IAD

ORDIAD

Chicago O'Hare Intl

Fri 8/22

5:15 pm-1:04 pm

2 stops18h 49m

Washington, D.C. Dulles Intl

Sun 8/24

4:56 pm-10:14 am

2 stops18h 18m

$210

ChicagoWashington, D.C.

MDW - IAD

MDWIAD

Chicago Midway

Wed 7/9

11:39 am-12:12 am

1 stop11h 33m

Washington, D.C. Dulles Intl

Fri 7/11

4:24 pm-11:17 pm

1 stop7h 53m

$226

ChicagoWashington, D.C.

ORD - IAD

ORDIAD

Chicago O'Hare Intl

Tue 7/22

11:44 am-11:43 am

1 stop22h 59m

Washington, D.C. Dulles Intl

Fri 7/25

8:20 pm-5:27 pm

1 stop22h 07m

$245

ChicagoWashington, D.C.

ORD - IAD

ORDIAD

Chicago O'Hare Intl

Sat 9/13

7:02 am-1:51 pm

1 stop5h 49m

Washington, D.C. Dulles Intl

Sun 9/14

5:26 pm-11:39 pm

1 stop7h 13m

$258

ChicagoWashington, D.C.

MDW - IAD

MDWIAD

Chicago Midway

Sun 8/10

11:07 am-11:20 am

3 stops23h 13m

Washington, D.C. Dulles Intl

Sun 8/17

9:12 pm-2:04 pm

2 stops17h 52m

$386

ChicagoWashington, D.C.

MDW - IAD

MDWIAD

Chicago Midway

Wed 7/9

11:20 am-10:45 pm

2 stops10h 25m

Washington, D.C. Dulles Intl

Thu 7/10

5:00 am-1:20 pm

1 stop9h 20m

$481

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/25

Showing 1-10 of 20 results

1

2

The best insider tips for Chicago to Washington, D.C. Dulles Intl Airport flights

Cheapflights partnered with top experts to bring you the best recommendations for your Chicago to Washington, D.C. Dulles Intl Airport trip

Airlines

Ethiopian Air

Economy Class offers a 32-inch pitch and 17-inch width, with personal entertainment monitors on most aircraft.

Cloud 9 passengers enjoy real Champagne and Ethiopian dishes like doro wot on long-haul flights.

Read more about Ethiopian Airby Paul Rubio

United Airlines

Basic Economy allows a personal item only; no carry-on bags unless you're a MileagePlus member.

Economy Plus offers extra legroom seats at the front of the economy cabin for MileagePlus Premier members.

Read more about United Airlinesby Harriet Baskas

Airports

ORD

For a quick departure, use the free shuttle train between terminals at ORD, especially during busy weekday mornings.

IAD

Take the Washington Metro Silver line from IAD to the city in under 40 minutes, a cost-effective option for arrivals.

Our travel experts

Paul Rubio

Expert on Ethiopian Air

Harriet Baskas

Expert on United Airlines

Ramsey Qubein

Expert on ORD and IAD

Best time to book a flight from Chicago to Dulles Intl

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

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

The best time to book flights from Chicago to Washington, D.C. Dulles Intl Airport is 27 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, August is the cheapest month in which you can book a flight from Chicago to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Chicago to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $346). 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 CHI to IAD?

A simple way to save on the total cost of your ticket is to fly from Chicago to Washington, D.C. Dulles Intl Airport in the morning. If you’re flexible enough to do this you can expect to save up to 56% on your trip compared to booking a flight at noon.

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

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

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

The most flights from CHI to IAD are scheduled on a Thursday (28 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (14 on average).

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

Reviews of airlines servicing Dulles Intl

Read through reviews of airlines operating flights from Chicago to Washington, D.C. Dulles Intl Airport, such as Delta, United Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,964 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very good

7,964 reviews

Delta

8.0

Very good

7,964 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

United Airlines

7.4

Good

8,838 reviews

Delta

8.0

Very good

7,964 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very good

7,964 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Allegiant Air

7.2

Good

712 reviews

Delta

8.0

Very good

7,964 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Sun Country Air

6.9

Okay

342 reviews

Delta

8.0

Very good

7,964 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

What are the cheapest airlines flying from Chicago to Washington, D.C. Dulles Intl Airport round-trip?
Flying on Frontier is currently your cheapest option to Washington, D.C. Dulles Intl Airport, with prices starting at $153. Additional round-trip tickets that might be worth considering are offered by United Airlines and Delta, with the lowest prices starting at $157 and $197, respectively. Frontier is 49% cheaper than the average price of flights available within the next 90 days to this destination.
What are the cheapest airlines to fly from Chicago to Washington, D.C. Dulles Intl Airport one-way?
$87 is the cheapest one-way deal found within the past few days, from Allegiant Air. You may also be able to find cheap deals on United Airlines and Frontier, with prices starting from $90 and $94, respectively.
What are the most reliable airlines from Chicago to Washington, D.C. Dulles Intl Airport?
The top 3 most reliable airlines when flying from Chicago to Washington, D.C. Dulles Intl Airport are Sun Country Air (100%), Air China (94%) and Austrian Airlines (89%).
What are the cheapest flights from Chicago to Washington, D.C. Dulles Intl Airport?
Looking at all options, your cheapest flight can be booked for $113. While the most popular route (Chicago O'Hare Intl - Washington, D.C. Dulles Intl) can be booked for $157 on average our data indicates $1,359 when flying from Chicago to Washington, D.C. Dulles Intl Airport.
Can I find deals for flights from Chicago to Dulles Intl that include hotel bookings?
Yes. In addition to deals on Chicago to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Chicago to Dulles Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Chicago to Dulles Intl.
Can I find deals for business class flights from Chicago to Dulles Intl?
Yes. Cheapflights offers flight deals from Chicago 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 Chicago to Washington, D.C. Dulles Intl Airport?
Currently, August is the cheapest month in which you can book a flight from Chicago to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Chicago to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $346). 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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Top 3 airlines flying from Chicago to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$54	Average$241	FlexibilityNo cancel fee	On-time62%
Delta	Cheapest$176	Average$342	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$178	Average$303	FlexibilityNo cancel fee	On-time69%

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$87+ Cheap flights from Chicago (CHI) 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 8/22. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Chicago to Dulles Intl with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Chicago to Washington, D.C. Dulles Intl are usually found in August or May, booked 27 days in advance, depart on a Friday or Wednesday and return on a Friday

Cheap flight deals from Chicago to Dulles Intl

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Chicago to Dulles Intl

Cheapest flights from Chicago to Dulles IntlExplore the most affordable flight options available from Chicago to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 26, 2025.

Explore the most affordable flight options available from Chicago to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 26, 2025.

Cheapflights Fare Finder

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

The best insider tips for Chicago to Washington, D.C. Dulles Intl Airport flights

Cheapflights partnered with top experts to bring you the best recommendations for your Chicago to Washington, D.C. Dulles Intl Airport trip

Airlines

Ethiopian Air

United Airlines

Airports

ORD

IAD

Our travel experts

Best time to book a flight from Chicago to Dulles Intl

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

Cheapflights Insights

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

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

Use this chart to determine the optimal time to book a round-trip flight from Chicago to Dulles Intl. Price data was last updated on June 20, 2025.

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

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

Find hourly flight availability from Chicago 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 26, 2025.

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

Use this chart to determine the cheapest time to fly round-trip from Chicago to Dulles Intl. Price data was last updated on December 16, 2024.

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

Explore weekly flight availability from Chicago 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 26, 2025.

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

Reviews of airlines servicing Dulles Intl

Read through reviews of airlines operating flights from Chicago to Washington, D.C. Dulles Intl Airport, such as Delta, United Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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Top 3 airlines flying from Chicago to Dulles Intl

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Cheapest flights from Chicago to Dulles Intl
Explore the most affordable flight options available from Chicago to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 26, 2025.