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 Singapore to Washington, D.C. Dulles Intl Airport?

Due to multiple factors, expect to potentially pay more when booking in August. For low rates, September can be a great choice for travel to Washington, D.C. Dulles Intl Airport. Flights to Washington, D.C. Dulles Intl Airport from Singapore in September are about $1,271 on average during September, but can be found for as low as $604.

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

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

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

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

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

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

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

Yes. Cheapflights offers flight deals from Singapore 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.

$446+ Flights from Singapore to Washington, D.C. Dulles Intl Airport

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Cheap flight deals from Singapore to Dulles Intl

Round-trip from	$747 (Air Canada)
One-way from	$446 (Flightnetwork)
Popular in	August
Cheapest in	September
Average price	$1,533

From Singapore to Washington, D.C. Dulles Intl

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

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Highest demand for flights based on searches. 10% potential increase in price ($153 potential increase over avg. RT price).

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Cheapest flight prices on average. 2% potential price decrease ($35 potential savings vs. average RT price).

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Average for round-trip flights in July 2025

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Find flight deals from Singapore to Dulles Intl

Cheapest flights from Singapore to Dulles Intl
Explore the most affordable flight options available from Singapore to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 31, 2025.

Tue 11/188:50 amSIN - IAD

2 stops25h 09mAir Canada

Tue 1/209:55 amIAD - SIN

2 stops32h 05mAir Canada

Deal found 7/30

$747

Mon 9/1511:25 pmSIN - IAD

1 stop32h 05mMultiple Airlines

Mon 9/2210:05 pmIAD - SIN

1 stop23h 35mMultiple Airlines

Deal found 7/31

$871

Mon 11/178:20 amSIN - IAD

1 stop35h 30mAir India

Tue 1/2011:00 amIAD - SIN

1 stop31h 00mAir India

Deal found 7/30

$1,019

Sun 10/2610:25 amSIN - IAD

1 stop38h 20mTurkish Airlines

Sat 11/81:30 pmIAD - SIN

1 stop31h 30mTurkish Airlines

Deal found 7/31

$1,051

Fri 10/312:00 amSIN - IAD

2 stops41h 23mChina Airlines

Sat 11/86:13 pmIAD - SIN

2 stops29h 52mChina Airlines

Deal found 7/30

$1,052

Thu 11/1311:55 pmSIN - IAD

1 stop31h 35mAir China

Fri 1/1610:00 pmIAD - SIN

1 stop34h 55mAir China

Deal found 7/29

$1,063

Best flights from Singapore to Dulles Intl
Discover carefully curated flight deals from Singapore to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 31, 2025.

Tue 11/188:50 amSIN - IAD

2 stops25h 09mAir Canada

Tue 1/209:55 amIAD - SIN

2 stops32h 05mAir Canada

Deal found 7/30

$747

Mon 9/1511:25 pmSIN - IAD

1 stop32h 05mMultiple Airlines

Mon 9/2210:05 pmIAD - SIN

1 stop23h 35mMultiple Airlines

Deal found 7/31

$871

Mon 11/178:20 amSIN - IAD

1 stop35h 30mAir India

Tue 1/2011:00 amIAD - SIN

1 stop31h 00mAir India

Deal found 7/30

$1,019

Sun 10/2610:25 amSIN - IAD

1 stop38h 20mTurkish Airlines

Sat 11/81:30 pmIAD - SIN

1 stop31h 30mTurkish Airlines

Deal found 7/31

$1,051

Fri 10/312:00 amSIN - IAD

2 stops41h 23mChina Airlines

Sat 11/86:13 pmIAD - SIN

2 stops29h 52mChina Airlines

Deal found 7/30

$1,052

Thu 11/1311:55 pmSIN - IAD

1 stop31h 35mAir China

Fri 1/1610:00 pmIAD - SIN

1 stop34h 55mAir China

Deal found 7/29

$1,063

Last-minute flights from Singapore to Dulles Intl
Discover last-minute flight deals from Singapore to Dulles Intl. Data last updated July 31, 2025 and is based on user searches.

Fri 8/13:10 amSIN - IAD

1 stop24h 30mQatar Airways

Tue 8/199:00 pmIAD - SIN

1 stop30h 45mQatar Airways

Deal found 7/30

$1,704

Sat 8/29:10 amSIN - IAD

1 stop33h 11mAir Canada

Tue 8/191:00 pmIAD - SIN

2 stops30h 05mAir Canada

Deal found 7/30

$983

Sat 8/29:10 amSIN - IAD

1 stop33h 11mMultiple Airlines

Tue 8/1910:05 pmIAD - SIN

1 stop23h 35mMultiple Airlines

Deal found 7/30

$1,220

Wed 8/61:25 amSIN - IAD

2 stops25h 00mMultiple Airlines

Tue 8/1210:45 pmIAD - SIN

2 stops54h 20mMultiple Airlines

Deal found 7/31

$1,438

Wed 8/61:25 amSIN - IAD

2 stops25h 00mSWISS

Tue 8/128:45 pmIAD - SIN

1 stop32h 20mSWISS

Deal found 7/31

$1,593

Wed 8/63:10 amSIN - IAD

1 stop41h 30mQatar Airways

Tue 8/1211:00 amIAD - SIN

1 stop22h 00mQatar Airways

Deal found 7/31

$1,863

Thu 8/76:15 amSIN - IAD

2 stops28h 13mUnited Airlines

Tue 8/125:53 pmIAD - SIN

1 stop24h 22mUnited Airlines

Deal found 7/31

$1,298

Thu 8/711:20 pmSIN - IAD

1 stop28h 35mBritish Airways

Tue 8/1210:40 pmIAD - SIN

1 stop29h 25mBritish Airways

Deal found 7/31

$1,366

Thu 8/1411:40 pmSIN - IAD

1 stop27h 35mLufthansa

Sun 8/1710:20 pmIAD - SIN

1 stop30h 20mLufthansa

Deal found 7/31

$1,668

Sat 8/2311:00 pmSIN - IAD

2 stops48h 15mAir India

Wed 9/311:00 amIAD - SIN

1 stop22h 45mAir India

Deal found 7/30

$1,527

Sat 8/237:30 amSIN - IAD

2 stops34h 25mDelta

Mon 9/11:15 pmIAD - SIN

1 stop22h 25mDelta

Deal found 7/31

$1,649

One-way flights from Singapore to Dulles Intl
Search for one-way flight options from Singapore to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated July 31, 2025.

Mon 9/1511:25 pmSIN - IAD

1 stop32h 05mAir China

Deal found 7/31

$446

Sat 10/47:45 pmSIN - IAD

2 stops36h 00mIndiGo

Deal found 7/31

$482

Sat 9/138:45 amSIN - IAD

2 stops43h 25mMultiple Airlines

Deal found 7/30

$546

Sat 9/138:30 pmSIN - IAD

1 stop23h 10mAir India

Deal found 7/30

$553

Fri 9/126:15 amSIN - IAD

2 stops26h 50mAir Canada

Deal found 7/30

$672

Fri 10/32:00 amSIN - IAD

2 stops58h 23mChina Airlines

Deal found 7/31

$740

Mon 12/223:45 pmSIN - IAD

2 stops27h 28mEVA Air

Deal found 7/31

$780

Sun 12/2811:55 pmSIN - IAD

1 stop27h 40mSWISS

Deal found 7/31

$846

Sun 9/143:10 amSIN - IAD

1 stop24h 30mQatar Airways

Deal found 7/31

$918

Tue 12/3010:10 amSIN - IAD

1 stop27h 57mUnited Airlines

Deal found 7/31

$922

Sat 12/2712:30 amSIN - IAD

1 stop44h 40mEmirates

Deal found 7/31

$955

Tue 1/610:30 pmSIN - IAD

1 stop24h 20mKorean Air

Deal found 7/30

$972

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

SingaporeWashington, D.C.

SIN - IAD

SINIAD

Singapore Changi

Tue 11/18

8:50 am-8:59 pm

2 stops25h 09m

Washington, D.C. Dulles Intl

Tue 1/20

9:55 am-7:00 am

2 stops32h 05m

$747

SingaporeWashington, D.C.

SIN - IAD

SINIAD

Singapore Changi

Mon 9/15

11:25 pm-7:30 pm

1 stop32h 05m

Washington, D.C. Dulles Intl

Mon 9/22

10:05 pm-9:40 am

1 stop23h 35m

$871

SingaporeWashington, D.C.

SIN - IAD

SINIAD

Singapore Changi

Mon 11/17

8:20 am-6:50 am

1 stop35h 30m

Washington, D.C. Dulles Intl

Tue 1/20

11:00 am-7:00 am

1 stop31h 00m

$1,019

SingaporeWashington, D.C.

SIN - IAD

SINIAD

Singapore Changi

Sun 10/26

10:25 am-12:45 pm

1 stop38h 20m

Washington, D.C. Dulles Intl

Sat 11/8

1:30 pm-10:00 am

1 stop31h 30m

$1,051

SingaporeWashington, D.C.

SIN - IAD

SINIAD

Singapore Changi

Fri 10/31

2:00 am-7:23 am

2 stops41h 23m

Washington, D.C. Dulles Intl

Sat 11/8

6:13 pm-1:05 pm

2 stops29h 52m

$1,052

SingaporeWashington, D.C.

SIN - IAD

SINIAD

Singapore Changi

Thu 11/13

11:55 pm-6:30 pm

1 stop31h 35m

Washington, D.C. Dulles Intl

Fri 1/16

10:00 pm-9:55 pm

1 stop34h 55m

$1,063

SingaporeWashington, D.C.

SIN - IAD

SINIAD

Singapore Changi

Mon 9/15

11:25 pm-7:30 pm

1 stop32h 05m

$446

SingaporeWashington, D.C.

SIN - IAD

SINIAD

Singapore Changi

Sat 10/4

7:45 pm-7:45 pm

2 stops36h 00m

$482

SingaporeWashington, D.C.

SIN - IAD

SINIAD

Singapore Changi

Sat 9/13

8:45 am-4:10 pm

2 stops43h 25m

$546

SingaporeWashington, D.C.

SIN - IAD

SINIAD

Singapore Changi

Sat 9/13

8:30 pm-7:40 am

1 stop23h 10m

$553

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/31

Showing 1-10 of 19 results

Best time to book a flight from Singapore to Dulles Intl

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

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

Currently, July is the cheapest month in which you can book a flight from Singapore to Washington, D.C. Dulles Intl Airport (average of $306). Flying from Singapore 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.

Reviews of airlines servicing Dulles Intl

Peruse reviews from past customers who have flown with EVA Air, Korean Air, and China Airlines from Singapore to Washington, D.C. Dulles Intl Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

EVA Air

8.4

Very good

1,220 reviews

Reviews

1 / 20

10.0

Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

EVA Air

8.4

Very good

1,220 reviews

EVA Air

8.4

Very good

1,220 reviews

Reviews

1 / 20

10.0

Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

Korean Air

8.4

Very good

1,121 reviews

EVA Air

8.4

Very good

1,220 reviews

Reviews

1 / 20

10.0

Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

China Airlines

8.3

Very good

754 reviews

EVA Air

8.4

Very good

1,220 reviews

Reviews

1 / 20

10.0

Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

Emirates

8.1

Very good

3,300 reviews

EVA Air

8.4

Very good

1,220 reviews

Reviews

1 / 20

10.0

Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

Delta

8.0

Very good

7,981 reviews

EVA Air

8.4

Very good

1,220 reviews

Reviews

1 / 20

10.0

Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

Related info for your journey

What are the cheapest airlines to fly from Singapore to Washington, D.C. Dulles Intl Airport one-way?
The cheapest airlines for a one-way flight from Singapore to Washington, D.C. Dulles Intl Airport are Air China ($446), IndiGo ($482), and Air India ($553).
Can I find deals for flights from Singapore to Dulles Intl that include hotel bookings?
Yes. In addition to deals on Singapore to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Singapore to Dulles Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Singapore to Dulles Intl.
Can I find deals for business class flights from Singapore to Dulles Intl?
Yes. Cheapflights offers flight deals from Singapore 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 Singapore to Washington, D.C. Dulles Intl Airport?
Currently, July is the cheapest month in which you can book a flight from Singapore to Washington, D.C. Dulles Intl Airport (average of $306). Flying from Singapore 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.

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$446+ Cheap flights from Singapore 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 9/15. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Singapore to Dulles Intl with Cheapflights

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3. Compare prices and book

Cheap flight deals from Singapore to Dulles Intl

Keep the following information in mind while searching for Singapore to Dulles Intl flight deals. Data was last updated July 31, 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Singapore to Dulles Intl

Cheapest flights from Singapore to Dulles IntlExplore the most affordable flight options available from Singapore to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 31, 2025.

Explore the most affordable flight options available from Singapore to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 31, 2025.

Cheapflights Fare Finder

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

Best time to book a flight from Singapore to Dulles Intl

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

Cheapflights Insights

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

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

Reviews of airlines servicing Dulles Intl

Related info for your journey

Find useful and relevant information for your journey from Singapore 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 Singapore to Washington, D.C. Dulles Intl Airport one-way?

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

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

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

What is the cheapest month to book a flight from Singapore 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 Singapore to Dulles Intl

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Cheapest flights from Singapore to Dulles Intl
Explore the most affordable flight options available from Singapore to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 31, 2025.