HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Singapore

$439+ Cheap flights from Dulles Intl (IAD) to Singapore

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 5/4. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SIN
Apr 6 — Apr 131
Sun 4/6
Sun 4/13
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Dulles Intl to Singapore 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.

Cheap flight deals from Dulles Intl to Singapore

Keep the following information in mind while searching for Dulles Intl to Singapore flight deals. Data was last updated April 1, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$959
(Kiwi.com)

One-way from

$439
(Kiwi.com)

Popular in

December

Cheapest in

November

Average price

$1,022
Provider with most accurate pricing for Washington, D.C. (WAS)-Singapore Changi flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Singapore Changi flights.
Search Deals
From Washington, D.C. Dulles Intl to Singapore
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Singapore
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($26 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($48 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

Find flight deals from Dulles Intl to Singapore

Cheapest flights from Dulles Intl to Singapore
Explore the most affordable flight options available from Dulles Intl to Singapore. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 1, 2025.

This Kiwi.com deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/1410:05 pmIAD - SIN
2 stops44h 25mMultiple Airlines
Wed 4/233:45 amSIN - IAD
1 stop24h 00mMultiple Airlines
Deal found 3/30$959
This Air Canada deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/279:15 amIAD - SIN
2 stops33h 40mAir Canada
Sat 12/610:00 amSIN - IAD
2 stops24h 05mAir Canada
Deal found 3/31$960
This FlightHub deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/189:40 pmIAD - SIN
1 stop32h 15mTurkish Airlines
Mon 9/2911:10 pmSIN - IAD
1 stop24h 35mTurkish Airlines
Deal found 3/31$971
This CrystalTravel deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/48:05 pmIAD - SIN
1 stop29h 50mQatar Airways
Tue 11/252:00 amSIN - IAD
1 stop26h 55mQatar Airways
Deal found 3/31$983
This SAUDIA deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SAUDIA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/26:50 pmIAD - SIN
2 stops32h 55mSAUDIA
Fri 7/112:30 amSIN - IAD
1 stop25h 15mSAUDIA
Deal found 3/31$1,089
This Alaska Airlines deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/89:00 pmIAD - SIN
1 stop24h 00mAlaska Airlines
Tue 4/226:45 pmSIN - IAD
1 stop32h 55mAlaska Airlines
Deal found 4/1$1,113
This United Airlines deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/910:15 pmIAD - SIN
1 stop32h 10mUnited Airlines
Wed 4/239:00 amSIN - IAD
1 stop28h 09mUnited Airlines
Deal found 3/30$1,193
This JetBlue deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/39:00 pmIAD - SIN
1 stop24h 00mJetBlue
Wed 4/93:10 amSIN - IAD
1 stop24h 30mJetBlue
Deal found 3/31$1,196
This oojo deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/1811:00 amIAD - SIN
1 stop22h 45mAir India
Sun 5/2511:00 pmSIN - IAD
1 stop44h 40mAir India
Deal found 3/31$1,211
This Booking.com deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/241:30 pmIAD - SIN
2 stops39h 50mIndiGo
Tue 7/297:45 pmSIN - IAD
2 stops36h 00mIndiGo
Deal found 3/31$1,218
This Korean Air deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2111:50 amIAD - SIN
1 stop28h 10mKorean Air
Wed 11/261:30 amSIN - IAD
1 stop21h 20mKorean Air
Deal found 3/30$1,245

Cheapflights Fare Finder

Customize your flight search to find flights from Dulles Intl to Singapore that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 1, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Singapore that are best for you.

Fly from

Dulles Intl

Fly to

Singapore

Route

Depart

Return

Price

Washington, D.C.Singapore

IAD - SIN

IADSIN

Washington, D.C. Dulles Intl

Mon 4/14

10:05 pm-6:30 am

2 stops44h 25m

Singapore Changi

Wed 4/23

3:45 am-3:45 pm

1 stop24h 00m

$959

Washington, D.C.Singapore

IAD - SIN

IADSIN

Washington, D.C. Dulles Intl

Fri 9/19

9:13 am-7:05 am

2 stops33h 52m

Singapore Changi

Tue 10/21

9:10 am-9:39 am

2 stops36h 29m

$966

Washington, D.C.Singapore

IAD - SIN

IADSIN

Washington, D.C. Dulles Intl

Thu 9/18

9:40 pm-5:55 pm

1 stop32h 15m

Singapore Changi

Mon 9/29

11:10 pm-11:45 am

1 stop24h 35m

$971

Washington, D.C.Singapore

IAD - SIN

IADSIN

Washington, D.C. Dulles Intl

Thu 9/18

9:00 pm-3:45 pm

1 stop30h 45m

Singapore Changi

Sun 9/28

3:10 am-3:40 pm

1 stop24h 30m

$1,010

Washington, D.C.Singapore

IAD - SIN

IADSIN

Washington, D.C. Dulles Intl

Mon 4/14

9:00 pm-9:00 am

1 stop24h 00m

Singapore Changi

Tue 4/22

3:10 am-3:40 pm

1 stop24h 30m

$1,066

Washington, D.C.Singapore

IAD - SIN

IADSIN

Washington, D.C. Dulles Intl

Mon 6/2

6:50 pm-3:45 pm

2 stops32h 55m

Singapore Changi

Fri 7/11

2:30 am-3:45 pm

1 stop25h 15m

$1,089

Washington, D.C.Singapore

IAD - SIN

IADSIN

Washington, D.C. Dulles Intl

Mon 4/14

4:00 pm-6:45 am

1 stop26h 45m

Singapore Changi

Mon 4/21

8:40 pm-2:50 pm

1 stop30h 10m

$1,193

Washington, D.C.Singapore

IAD - SIN

IADSIN

Washington, D.C. Dulles Intl

Sun 5/18

11:00 am-9:45 pm

1 stop22h 45m

Singapore Changi

Sun 5/25

11:00 pm-7:40 am

1 stop44h 40m

$1,211

Washington, D.C.Singapore

IAD - SIN

IADSIN

Washington, D.C. Dulles Intl

Tue 6/24

1:30 pm-5:20 pm

2 stops39h 50m

Singapore Changi

Tue 7/29

7:45 pm-7:45 pm

2 stops36h 00m

$1,218

Washington, D.C.Singapore

IAD - SIN

IADSIN

Washington, D.C. Dulles Intl

Mon 4/14

9:00 pm-3:35 pm

2 stops30h 35m

Singapore Changi

Mon 4/21

9:15 pm-3:40 pm

2 stops30h 25m

$1,265

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

Showing 1-10 of 29 results
1
2
3

Best time to book a flight from Dulles Intl to Singapore

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

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

Currently, September is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Singapore (average of $1,011). Flying from Washington, D.C. Dulles Intl Airport to Singapore in December is currently the most expensive (average of $1,684). 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 IAD to SG?

Find hourly flight availability from Dulles Intl to Singapore. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 1, 2025.

When flying from Washington, D.C. Dulles Intl Airport to Singapore, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Singapore by month

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

In terms of precipitation, rainfall in Singapore ranges from 5.9 - 10.6 inches per month. December is typically the wettest month, when rainfall can reach 10.6 in. July is typically the driest time to visit Singapore when rainfall is around 5.9 in.

Temperature in Singapore by month

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

If weather is an important factor for your trip to Singapore, use this chart to help with planning. For those seeking warmer temperatures, March is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 78.8 F).

Reviews of airlines servicing Singapore

Get insights into the airlines that provide service to Singapore. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Singapore. Reviews last updated April 1, 2025.
Peruse reviews from past customers who have flown with Korean Air, ANA and SWISS from Washington, D.C. to Singapore to help guide your decision. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,052 reviews

Boarding

8.5

Entertainment

8.2

Food

8.1

Comfort

8.3

Overall

8.4

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Korean Air
8.4
Very good
1,052 reviews
Korean Air
8.4
Very good
1,052 reviews

Boarding

8.5

Entertainment

8.2

Food

8.1

Comfort

8.3

Overall

8.4

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
ANA
8.3
Very good
830 reviews
Korean Air
8.4
Very good
1,052 reviews

Boarding

8.5

Entertainment

8.2

Food

8.1

Comfort

8.3

Overall

8.4

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
SWISS
7.5
Good
1,572 reviews
Korean Air
8.4
Very good
1,052 reviews

Boarding

8.5

Entertainment

8.2

Food

8.1

Comfort

8.3

Overall

8.4

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Cathay Pacific
7.5
Good
841 reviews
Korean Air
8.4
Very good
1,052 reviews

Boarding

8.5

Entertainment

8.2

Food

8.1

Comfort

8.3

Overall

8.4

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Qatar Airways
7.4
Good
3,541 reviews
Korean Air
8.4
Very good
1,052 reviews

Boarding

8.5

Entertainment

8.2

Food

8.1

Comfort

8.3

Overall

8.4

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.

Related info for your journey

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

    For one-way options, check prices for Turkish Airlines. According to our data, you can fly for as low as $454. Users have also found prices from $484 and $490 on Air India and IndiGo, respectively.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Dulles Intl to Singapore 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 Washington, D.C. Dulles Intl Airport to Singapore?

    Currently, September is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Singapore (average of $1,011). Flying from Washington, D.C. Dulles Intl Airport to Singapore in December is currently the most expensive (average of $1,684). 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

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 Singapore

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Haneda flights
Dulles Intl to Narita flights
Reagan-National to Narita flights
Reagan-National to Haneda flights
Dulles Intl to Incheon Intl flights
Baltimore to Narita flights
Baltimore to Haneda flights
Dulles Intl to Suvarnabhumi flights
Reagan-National to Suvarnabhumi flights
Dulles Intl to Hyderabad flights
Baltimore to Suvarnabhumi flights
Dulles Intl to Taiwan Taoyuan Intl flights
Dulles Intl to Ho Chi Minh City flights
Dulles Intl to Manila flights
Reagan-National to Incheon Intl flights
Dulles Intl to New Delhi flights
Dulles Intl to Bangalore flights
Reagan-National to Hyderabad flights
Baltimore to Incheon Intl flights
Baltimore to Hyderabad flights
Dulles Intl to Gimpo Intl flights
Reagan-National to Bangalore flights
Baltimore to Bangalore flights
Dulles Intl to Denpasar flights
Reagan-National to New Delhi flights
Dulles Intl to Hongqiao Intl flights
Reagan-National to Taiwan Taoyuan Intl flights
Baltimore to Taiwan Taoyuan Intl flights
Dulles Intl to Mumbai flights
Reagan-National to Manila flights
Baltimore to Manila flights
Dulles Intl to Capital flights
Reagan-National to Gimpo Intl flights
Dulles Intl to Sung Shan flights
Dulles Intl to Lahore flights
Reagan-National to Denpasar flights
Baltimore to Denpasar flights
Baltimore to New Delhi flights
Baltimore to Ho Chi Minh City flights
Baltimore to Gimpo Intl flights
Dulles Intl to Islamabad flights
Dulles Intl to Chennai flights
Reagan-National to Ho Chi Minh City flights
Baltimore to Mumbai flights
Reagan-National to Mumbai flights
Dulles Intl to Pu Dong flights
Reagan-National to Capital flights
Dulles Intl to Kathmandu flights
Baltimore to Capital flights
Reagan-National to Hongqiao Intl flights

Top 9 airlines flying from Dulles Intl to Singapore

Discover the top 9 airlines that operate flights from Dulles Intl to Singapore. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$831Average$996FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$935Average$1,405FlexibilityNo cancel feeOn-time69%
DeltaCheapest$1,009Average$1,470FlexibilityNo cancel feeOn-timeN/A
Qatar AirwaysCheapest$1,014Average$1,321FlexibilityNo cancel feeOn-time68%
Korean AirCheapest$1,037Average$1,332FlexibilityNo cancel feeOn-time81%
JetBlueCheapest$1,043Average$1,191FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$1,124Average$1,451FlexibilityNo cancel feeOn-time71%
Singapore AirlinesCheapest$1,206Average$1,780FlexibilityNo cancel feeOn-time81%
ANACheapest$1,581Average$2,169FlexibilityNo cancel feeOn-time80%

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.