Find Cheap Flights from Washington to Singapore Changi (WAS - SIN)

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Fri 11/24
Fri 12/1
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Good to Know

Low Season:
October
Best time to beat the crowds
3%
expected price decrease
High Season:
December
Most popular time to fly
8%
expected price increase
Average Price:
$1852
(avg. price over the last 2 weeks)
Good Deal:
$1020
or less (round trip)

When to Book Flights from Washington to Singapore Changi

Average price per month
Flight prices as travel date approaches
-1 day
-2 days

Top tips for Finding a Cheap Flight

Looking for a cheap flight? 25% of our users found flights on this route for $1020 or less.
The cheapest flight from Washington to Singapore Changi was found 69 days before departure, on average.
Book at least 5 weeks before departure in order to get a below-average price.
Morning departure is around 10% more expensive than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for Booking Washington to Singapore Changi Flights

How long does a flight from Washington to Singapore Changi take?
An average nonstop flight takes 25h 50m, covering a distance of 9655 miles.
Which airlines provide the cheapest flights from Washington to Singapore Changi?
In the past 3 days, the cheapest round-trip tickets were found on Air China ($537), Multiple Airlines ($644) and Turkish Airlines ($843).
Do I need a passport to fly between Washington and Singapore Changi?
Yes.
What’s the cheapest day of the week to fly Washington to Singapore Changi?
For Washington to Singapore Changi, Thursday is the cheapest day to fly on average and Friday is the most expensive. Flying from Singapore Changi back to Washington, the best deals are generally found on Tuesday, with Monday being the most expensive.

Book cheap flights from Washington to Singapore Changi (round-trip)

Airports
Origin
Washington
$537
only
$537
$644
only
$644
Destination
Singapore
$537
only
$537
Thu, Mar 8
IAD
SIN
25h 55m
Wed, Mar 28
SIN
IAD
41h 05m
Trip: 20 days
6.3GoodShow reviews
Overall 6.3 Good
Based on 3241 reviews
Overall
6.4
Boarding
6.6
Comfort
6.4
Crew
6.8
Entertainment
5.9
Food
5.9
PEK
IAH
Mediocre 2.0

Doesn't matter if your economy or first class. First one to the gate gets in. Good for me because I always fly economy.

Typical Chinese service, poor. Will never fly Air China ever again. Only reason why I book the ticket because it was cheap, now I know why.

PEK
BKK
Okay 5.6

The flight waited which I'm sure is a complaint by others. This is due to the very inefficient transfer process in Beijing.

Zero entertainment. I know it's only a 4-5 hour flight but still.

PEK
SGN
Mediocre 3.0

The crew were nice

Again the food was terrible. And this was an international flight and there wasn’t even a tv for watching movies! So all you could do was sit crammed in your seat for hours!!

SGN
PEK
Mediocre 3.6

The food was good for airplane food.

It makes no sense to not allow the use of any electronics during take off and landing. My E reader doesn't even use a cell signal, but I couldn't have it out. Also, not allowing cell phones at ANY time during the flight, even in airplane mode, is ridiculous because tablets, which can have cell signals, are allowed. Air China is just frustrating.

IAD
PEK
Good 7.3

I have flown with Air China before and had a bad experience. They are improving everything from customer service to in-flight amenities. Transfers in Beijing are still a problem with zero efficiency.

They don't honor seat selection when booking but attendant at gate helped and was very understanding.

Sat, Jan 13
DCA
SIN
58h 15m
Tue, Jan 23
SIN
DCA
35h 55m
Trip: 11 days
Overall 0.0 Poor
Based on 0 reviews
Sun, May 6
IAD
SIN
30h 55m
Mon, May 14
SIN
IAD
31h 50m
Trip: 9 days
8.0ExcellentShow reviews
Overall 8.0 Excellent
Based on 16627 reviews
Overall
8.0
Boarding
7.9
Comfort
7.8
Crew
8.3
Entertainment
8.1
Food
8.0
IAD
IST
Mediocre 2.0

Treated very poorly no hotel stay in the airport for 24 hour

Nothing

TIA
IST
Excellent 10.0

Comfortable, great food, awesome crew! I love that they have a great variety of entertainment material.

TIA
IST
Excellent 10.0

Good service and very smooth flight

IST
SFO
Excellent 9.3

Not enough bathrooms. Very long lines to go to the bathroom.

MRS
IST
Excellent 10.0

I like the food and movies

Nothing

Thu, Mar 8
DCA
SIN
32h 00m
Wed, Mar 28
SIN
DCA
30h 32m
Trip: 20 days
8.7ExcellentShow reviews
Overall 8.7 Excellent
Based on 1962 reviews
Overall
8.8
Boarding
8.9
Comfort
8.6
Crew
9.0
Entertainment
8.8
Food
8.4
SIN
LAX
Excellent 8.0

The service, kind and pleasant.

LAX
NRT
Excellent 8.0

I like the personal TV, my foot rest and water holder frequent water serve,

For me coffee is too strong, and I like the food on the way to Tokyo better than on the way back to LA

SYD
SIN
Excellent 10.0

Food was delicious!

MAN
IAH
Excellent 10.0

Foot rest, large movie screen, good food

They ran out of diet drinks.

SFO
HKG
Good 6.0

Foods serving were too slow for economy class. Not enough selections for entertainment.

Fri, Nov 24
DCA
SIN
29h 30m
Fri, Dec 1
SIN
DCA
30h 05m
$1123
Trip: 8 days
7.8GoodShow reviews
Overall 7.8 Good
Based on 13693 reviews
Overall
8.0
Boarding
8.1
Comfort
7.7
Crew
8.4
Entertainment
7.5
Food
7.3
LAX
HNL
Okay 5.0

The gentleman at the gate was super helpful and helped us check our bags at the gate.

Zero leg room. Zero arm room. The entertainment system did not function. No food for such a long flight unless you pay more then the food is actually worth.

JFK
DTW
Excellent 10.0

I got off the flight at out side,but i forgot to carried my small bag .and then the Crew returned me the bag very soon.they were very kind,thank you very much.

SEA
SJC
Okay 5.6

No vegetarian options in first class.. and go go wouldn5 hook up. Flight was an hour late...but that was ok.

The pilot did a nice job of flying in and banking so we could see the view..

PTY
ATL
Excellent 9.6

Crew was kind, entertainment and food were good

Seats are really tight

JFK
CUN
Excellent 9.0

Entertainment and crew were great- comfortable seats, got to watch a couple of movies with headphones provided by Delta; forgot mine so I assumed I would be miserable thru the whole 4 hour flight. so glad I was wrong! Would definitely take another flight with Delta... looking into the frequent flyer program as we speak

Tue, Jan 16
IAD
SIN
25h 55m
Sun, Mar 4
SIN
IAD
26h 20m
Trip: 48 days
6.3GoodShow reviews
Overall 6.3 Good
Based on 3241 reviews
Overall
6.4
Boarding
6.6
Comfort
6.4
Crew
6.8
Entertainment
5.9
Food
5.9
PEK
LAX
Good 6.6

Most of the staff was very helpful and accommodating. On the first leg of the flight one of the attendants even suggested a wine with dinner, a very kind gesture.

When my husband and I went to check in for our flight at the desk we had to wait very long time to get checked in. We noticed that one of the girls was in training, which is understandable but just inconvenient. We are both very patient people but this just made us nervous because our first flight on Air China to Japan on 10/26/17 was very delayed and caused us to have to literally run and still go through a rigorous security check. We were not rushed through the line even though we had nothing to do with our flight being delayed on our second leg. We then had to wait in another long line for security even after arriving into China on our flight back. There was also someone on board before take off with a medical problem and we could tell that some of the patrons started getting a bit aggressive or irritable. I don’t think the crew could’ve done much in that regard but wish the issue had been resolved a little quicker. I believe it was a 40 minute delay in take off.

PEK
BKK
Okay 5.6

The flight waited which I'm sure is a complaint by others. This is due to the very inefficient transfer process in Beijing.

Zero entertainment. I know it's only a 4-5 hour flight but still.

PEK
BKK
Mediocre 3.0

Nothing

All our checked bags, all of them, never made it. We are still waiting. Very cramped on totally full flight.

LAX
PEK
Mediocre 3.0

The crew were nice

The food was terrible. There were no amenedies for flying internationally like I am used to. And the movies available?! Usually international flights have all kinds of movies to watch. There were only a few that is even heard of.

PEK
SGN
Mediocre 3.0

The crew were nice

Again the food was terrible. And this was an international flight and there wasn’t even a tv for watching movies! So all you could do was sit crammed in your seat for hours!!

Sun, Apr 1
IAD
SIN
25h 50m
Wed, Apr 25
SIN
IAD
41h 05m
Trip: 25 days
6.3GoodShow reviews
Overall 6.3 Good
Based on 3241 reviews
Overall
6.4
Boarding
6.6
Comfort
6.4
Crew
6.8
Entertainment
5.9
Food
5.9
IAD
PEK
Good 7.3

I have flown with Air China before and had a bad experience. They are improving everything from customer service to in-flight amenities. Transfers in Beijing are still a problem with zero efficiency.

They don't honor seat selection when booking but attendant at gate helped and was very understanding.

LAX
PEK
Mediocre 3.0

The crew were nice

The food was terrible. There were no amenedies for flying internationally like I am used to. And the movies available?! Usually international flights have all kinds of movies to watch. There were only a few that is even heard of.

PEK
LAX
Good 6.6

Most of the staff was very helpful and accommodating. On the first leg of the flight one of the attendants even suggested a wine with dinner, a very kind gesture.

When my husband and I went to check in for our flight at the desk we had to wait very long time to get checked in. We noticed that one of the girls was in training, which is understandable but just inconvenient. We are both very patient people but this just made us nervous because our first flight on Air China to Japan on 10/26/17 was very delayed and caused us to have to literally run and still go through a rigorous security check. We were not rushed through the line even though we had nothing to do with our flight being delayed on our second leg. We then had to wait in another long line for security even after arriving into China on our flight back. There was also someone on board before take off with a medical problem and we could tell that some of the patrons started getting a bit aggressive or irritable. I don’t think the crew could’ve done much in that regard but wish the issue had been resolved a little quicker. I believe it was a 40 minute delay in take off.

PEK
SFO
Mediocre 3.6

There were personal movie screens with movies I liked.

The food was pretty bad. The bottom seat cushion was quite hard so I couldn't sleep because I was shifting my weight every hour. We were told at the boarding gate that the flight was full when we asked about upgrades, but the economy plus section was almost empty once we were on. I don't understand the reasoning for lying about the flight being full. If you won't sell us an upgrade, just say so.

PEK
SGN
Mediocre 3.0

The crew were nice

Again the food was terrible. And this was an international flight and there wasn’t even a tv for watching movies! So all you could do was sit crammed in your seat for hours!!

Wed, Jan 17
IAD
SIN
34h 14m
Mon, Feb 5
SIN
IAD
33h 38m
Trip: 20 days
Overall 0.0 Poor
Based on 0 reviews
Fri, Dec 8
DCA
SIN
42h 10m
Thu, Dec 14
SIN
DCA
34h 01m
$1546
Trip: 7 days
7.8GoodShow reviews
Overall 7.8 Good
Based on 1488 reviews
Overall
8.0
Boarding
7.9
Comfort
7.7
Crew
8.4
Entertainment
7.1
Food
7.4
ATL
CLE
Okay 4.6

old plane, tight and uncomfortable

SFO
AMS
Excellent 10.0

From pre-boarding, to boarding, to the food, and the attentiveness, everything was top notch! The cleanliness of the plane was only topped by the friendliness of the crew.

The flight was marked at almost 11hrs but ended up being only 9...not a negative other than it meant not spending as much time on board!

DMM
AMS
Okay 4.3

staff was fine

old old plane, very uncomfortable. Tiny bad screen made movies pointless

AMS
PRG
Excellent 10.0

Equally friendly crew and experience. It was complimented by the time we got to spend in the fantastic KLM lounge while we waited for the flight.

Nothing!

AMS
IAH
Good 7.3

Per usual, KLM can't seem to figure out the order of boarding the plane. Should be business - priority - everyone else. Instead they do priority first, and that's usually two-thirds of the passengers. Strange choice of in-flight movies; no accounting for taste, I guess.

Sat, Feb 10
IAD
SIN
34h 19m
Mon, Feb 19
SIN
IAD
51h 33m
Trip: 10 days
Overall 0.0 Poor
Based on 0 reviews
Tue, Apr 3
DCA
SIN
32h 40m
Mon, Apr 23
SIN
DCA
30h 32m
Trip: 21 days
8.7ExcellentShow reviews
Overall 8.7 Excellent
Based on 1962 reviews
Overall
8.8
Boarding
8.9
Comfort
8.6
Crew
9.0
Entertainment
8.8
Food
8.4
MAN
IAH
Excellent 10.0

Foot rest, large movie screen, good food

They ran out of diet drinks.

SYD
SIN
Excellent 10.0

Food was delicious!

JNB
SIN
Poor 0.0

I purchased this ticket without realizing that the law stipulated 6-month validity remaining on one's US passport to enter singapore. The Singapore Airways website does not state this anywhere, and it was not until I arrived at the airport that I was informed that I wouldn't be able to check in, but nor could I refund or transfer the ticket. The booker should be obliged, when one enters the passport information upon purchasing the ticket, to make note if the passport expiration time is not valid for the flight. Spent $600+ on the flight, and the customer service person I spoke to from the airport was very abrasive and not interested in helping me figure out an alternative.

IAH
SIN
Excellent 10.0

Service was great.

Bit on the cold side.

SFO
HKG
Good 7.0

Entertainment even in economy class was excellent -- tons of movies, games, etc. Cabin crew were friendly. Bathroom was very large.

In economy, seating was incredibly tight (very little legroom) and at least in my seat, very little reclining. For a 14 hour flight through the night, it made it very difficult to actually get any rest. Food was OK.

Sat, Mar 3
IAD
SIN
48h 44m
Sat, Mar 10
SIN
IAD
44h 10m
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Wed, Mar 7
IAD
SIN
29h 50m
Fri, Mar 23
SIN
IAD
32h 05m
Trip: 16 days
8.0ExcellentShow reviews
Overall 8.0 Excellent
Based on 16627 reviews
Overall
8.0
Boarding
7.9
Comfort
7.8
Crew
8.3
Entertainment
8.1
Food
8.0
IST
JFK
Excellent 10.0

Comfortable, great food, awesome crew! I love that they have a great variety of entertainment material.

IST
SFO
Excellent 9.3

Not enough bathrooms. Very long lines to go to the bathroom.

IAD
IST
Mediocre 2.0

Treated very poorly no hotel stay in the airport for 24 hour

Nothing

BUD
IST
Mediocre 3.3

They stole Items from my bag

TIA
IST
Excellent 10.0

Comfortable, great food, awesome crew! I love that they have a great variety of entertainment material.

Mon, May 21
DCA
SIN
32h 40m
Sun, May 27
SIN
DCA
30h 32m
Trip: 7 days
8.7ExcellentShow reviews
Overall 8.7 Excellent
Based on 1962 reviews
Overall
8.8
Boarding
8.9
Comfort
8.6
Crew
9.0
Entertainment
8.8
Food
8.4
SFO
HKG
Good 6.0

Foods serving were too slow for economy class. Not enough selections for entertainment.

JNB
SIN
Poor 0.0

I purchased this ticket without realizing that the law stipulated 6-month validity remaining on one's US passport to enter singapore. The Singapore Airways website does not state this anywhere, and it was not until I arrived at the airport that I was informed that I wouldn't be able to check in, but nor could I refund or transfer the ticket. The booker should be obliged, when one enters the passport information upon purchasing the ticket, to make note if the passport expiration time is not valid for the flight. Spent $600+ on the flight, and the customer service person I spoke to from the airport was very abrasive and not interested in helping me figure out an alternative.

SFO
HKG
Good 7.0

Entertainment even in economy class was excellent -- tons of movies, games, etc. Cabin crew were friendly. Bathroom was very large.

In economy, seating was incredibly tight (very little legroom) and at least in my seat, very little reclining. For a 14 hour flight through the night, it made it very difficult to actually get any rest. Food was OK.

LAX
NRT
Excellent 8.0

I like the personal TV, my foot rest and water holder frequent water serve,

For me coffee is too strong, and I like the food on the way to Tokyo better than on the way back to LA

SYD
SIN
Excellent 10.0

Food was delicious!

Sun, Dec 3
IAD
SIN
39h 42m
Thu, Dec 7
SIN
IAD
52h 42m
Trip: 5 days
Overall 0.0 Poor
Based on 0 reviews
Thu, Feb 1
DCA
SIN
32h 00m
Wed, Feb 21
SIN
DCA
30h 57m
Trip: 21 days
8.7ExcellentShow reviews
Overall 8.7 Excellent
Based on 1962 reviews
Overall
8.8
Boarding
8.9
Comfort
8.6
Crew
9.0
Entertainment
8.8
Food
8.4
HKG
SIN
Good 6.0

Flight delayed twice without informing us the reason, and after boarding, we waited for v long to take off also

SFO
HKG
Good 6.0

Foods serving were too slow for economy class. Not enough selections for entertainment.

MAN
IAH
Excellent 10.0

Foot rest, large movie screen, good food

They ran out of diet drinks.

SIN
BLR
Good 6.6

Seats were bit hard without proper head rest.entertainment kiosk was not working.

DAC
SIN
Excellent 10.0

Great service always

Wed, Mar 7
DCA
SIN
32h 00m
Fri, Mar 23
SIN
DCA
30h 12m
Trip: 16 days
8.7ExcellentShow reviews
Overall 8.7 Excellent
Based on 1962 reviews
Overall
8.8
Boarding
8.9
Comfort
8.6
Crew
9.0
Entertainment
8.8
Food
8.4
LAX
ICN
Excellent 10.0

Amazing service and comfortable lay flat bed

SYD
SIN
Excellent 10.0

Food was delicious!

SFO
HKG
Good 7.0

Entertainment even in economy class was excellent -- tons of movies, games, etc. Cabin crew were friendly. Bathroom was very large.

In economy, seating was incredibly tight (very little legroom) and at least in my seat, very little reclining. For a 14 hour flight through the night, it made it very difficult to actually get any rest. Food was OK.

HKG
SIN
Good 6.0

Flight delayed twice without informing us the reason, and after boarding, we waited for v long to take off also

IAH
SIN
Excellent 10.0

Service was great.

Bit on the cold side.

Fri, Nov 24
IAD
SIN
33h 35m
Fri, Dec 1
SIN
IAD
41h 38m
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Wed, Jan 17
DCA
SIN
42h 20m
Mon, Feb 5
SIN
DCA
36h 37m
Trip: 20 days
Overall 0.0 Poor
Based on 0 reviews
Sun, Dec 3
DCA
SIN
31h 50m
Wed, Dec 6
SIN
DCA
33h 34m
$1027
Trip: 4 days
8.7ExcellentShow reviews
Overall 8.7 Excellent
Based on 1962 reviews
Overall
8.8
Boarding
8.9
Comfort
8.6
Crew
9.0
Entertainment
8.8
Food
8.4
DAC
SIN
Excellent 10.0

Great service always

SFO
HKG
Good 7.0

Entertainment even in economy class was excellent -- tons of movies, games, etc. Cabin crew were friendly. Bathroom was very large.

In economy, seating was incredibly tight (very little legroom) and at least in my seat, very little reclining. For a 14 hour flight through the night, it made it very difficult to actually get any rest. Food was OK.

IAH
SIN
Excellent 10.0

Service was great.

Bit on the cold side.

SIN
LAX
Excellent 8.0

The service, kind and pleasant.

SIN
BLR
Good 6.6

Seats were bit hard without proper head rest.entertainment kiosk was not working.

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The fares displayed include all taxes and fees for economy class travel and were found by the provider in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.