S$ 767 Find Cheap Flights to Boulder

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Boulder departing on 27-2. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
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Good to know

Low season

August

High season

May

Cheapest flight

S$ 767
Best time to beat the crowds (21% less expensive on average)
Most popular time to fly and prices are also 6% lower on average.
Flight from Singapore to Denver

FAQs - booking Boulder flights

  • How to fly to Boulder?

    You cannot fly directly to Boulder. KAYAK recommends you fly to Denver Intl (DEN) (53.76 km from Boulder). From there you can rent a car or get a taxi.

  • What airports are near Boulder?

    The closest airport is Denver Intl (DEN) (53.76 km). KAYAK recommends you fly to Denver Intl.

  • How far is Denver Intl Airport from central Denver?

    The city centre of Denver is 30 km from Denver.

  • What is the name of Denver’s airport?

    When flying to Denver, you'll arrive at Denver Intl Airport (DEN). The airport is also known as Denver or Denver Intl.

  • How does KAYAK find such low prices on flights to Boulder?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights to Boulder.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket to Boulder?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Boulder is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights to Boulder?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Boulder with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight to Boulder?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Boulder up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding cheap flights to Boulder

  • There is no major airport in Boulder. It is instead served by Denver Intl Airport.
  • Book at least 1 week before departure in order to get a below-average price.
  • High season is considered to be January, February and December. The cheapest month to fly from Singapore is August.
  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Boulder flight deals.
See more tips

Top airlines flying to Boulder

Need help choosing which airline to fly with from Singapore to Boulder? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.3
Japan AirlinesOverall score based on 1449 reviews
8.4Boarding
8.2Comfort
8.7Crew
7.7Food
7.8Entertainment
Airline reviews

Website from the 1990s, super frustrating customer support, inflight experience merely OK - more like United than e.g. Emirates

2.0 MediocreGary, Jan 2025NRT - SEA
Read more Japan Airlines reviews

Website from the 1990s, super frustrating customer support, inflight experience merely OK - more like United than e.g. Emirates

The seats are significantly more comfortable than US airlines and the staff are much friendlier. The food is also much better, as they are particularly accommodating to any dietary restrictions.

Food was great, Entertainment was bad, movies were not current and just did not have good variety. Granted I was tired so cranky might have played into my evaluation. Overall based on cost I definitely would fly them again. I am a million mile flyer on another airline, the service on JAL really beats all airlines.

Could had been better if they include in their menu some western food.

They 7 seats in one row for Business class while most business class for other airlines are 4 seats in one row. the seat was narrow. the Toilet was so smell, dimming light, no water out of faucet. Terrible.

Difficult to access advanced check-in online. No way to understand why it wouldn’t work. Call center not answering. Email for answers took days to respond, Kind service at the airport and on the flight made up for disappointing service before flight.

Courteous and helpful employees. Comfortable seats and temperature of aircraft . Did not need squid in my salad but glad to have the menu information advising me of what it was

Everything was great, except the Wifi, but that's understandable.

A great flight experience - great seats, lots of ROOM for legs & in the aisle. Great attendants! My flight cost me the same as ZipAir, the website was WAY less confusing & wonky - this will be my 1st choice for my next Japan trip. Very pleased / well cared for.

The plane was dirty, there was trash in the seat pocket in front of me.

I liked all the informational texts. I always knew where to go and when .

Not as good as expected Air Can needs to improve totally rated on internet as worst

Received an email the night before showing that there would be seatback entertainment on our flight. We get on and there was no seatback entertainment. And then it was a scramble to try to set up the iPads for the kids before takeoff so they could watch something for the four hour flight.

The reason I don’t fly United. No in seat entertainment for a long flight and inconsistent WiFi and entertainment available from my device.

It was 4 hours late. Almost missed my connecting flight no food or drinks on connecting flight. Overall terrible experience

It was a good flight. Nothing comes to mind about how it could have been better. It was a newer plane, seemed like a great upgrade from your older ones. Staff was very good as well.

The food for long haul was poor compared to Singapore airlines economy. Pasta plain with tomato sauce . Singapore airlines give me Hagen dash small ice cream cup it was great. The choices of dinner course Singapore air also much better The crew mostly friendly. The economy seat are as expected.

The plane was clean. The staff was excellent. The flight attendants were very good. Enjoyable flight. Overall. The seats in the back are too small but, will always be.

I was at the back of the plane with earphones, and I could still hear the chatty flight attendants; I wasn't able to sleep at all.

Flight was 3 1/2 hour delayed with no credit or meal vouchers

Book Cheap Boulder Plane Tickets

Recent return flight deals

4-3Tue
2 stops
33h 38mSIN-DEN
11-3Tue
2 stops
42h 01mDEN-SIN
S$ 1,050
4-3Tue
2 stops
32h 08mSIN-DEN
12-3Wed
2 stops
47h 06mDEN-SIN
S$ 1,186
1-2Sat
1 stopUnited Airlines
20h 35mSIN-DEN
16-2Sun
1 stopUnited Airlines
21h 30mDEN-SIN
S$ 1,271
19-2Wed
1 stopUnited Airlines
37h 30mSIN-DEN
25-2Tue
1 stopUnited Airlines
22h 25mDEN-SIN
S$ 1,278
4-3Tue
1 stopTurkish Airlines
27h 35mSIN-DEN
11-3Tue
1 stopTurkish Airlines
31h 00mDEN-SIN
S$ 1,395
4-4Fri
1 stopTurkish Airlines
47h 00mSIN-DEN
17-4Thu
1 stopTurkish Airlines
45h 25mDEN-SIN
S$ 1,432
18-2Tue
2 stopsKorean Air
36h 30mSIN-DEN
25-2Tue
2 stopsKorean Air
31h 35mDEN-SIN
S$ 1,498
3-3Mon
2 stopsDelta
31h 28mSIN-DEN
11-3Tue
2 stopsDelta
32h 05mDEN-SIN
S$ 1,504
17-5Sat
2 stopsDelta
31h 01mSIN-DEN
28-5Wed
2 stopsDelta
32h 45mDEN-SIN
S$ 1,565
20-2Thu
2 stopsKorean Air
31h 28mSIN-DEN
3-3Mon
2 stopsKorean Air
31h 10mDEN-SIN
S$ 7,448

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Recent one-way flight deals

27-2Thu
2 stops
46h 16mSIN-DEN
S$ 767
28-2Fri
3 stops
41h 46mSIN-DEN
S$ 768
28-2Fri
2 stops
38h 26mSIN-DEN
S$ 771
30-3Sun
2 stops
41h 26mSIN-DEN
S$ 791
29-3Sat
2 stops
40h 16mSIN-DEN
S$ 915
11-7Fri
3 stops
35h 28mSIN-DEN
S$ 1,072
28-2Fri
1 stopSingapore Airlines
37h 51mSIN-DEN
S$ 1,250
12-7Sat
2 stopsSTARLUX Airlines
22h 39mSIN-DEN
S$ 1,309
12-7Sat
1 stopAir Canada
24h 20mSIN-DEN
S$ 1,312
27-2Thu
3 stopsEthiopian Air
49h 12mSIN-DEN
S$ 2,020

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Last minute flights to Boulder

Last minute flight, train and bus deals

21-1Tue
multi-stopUnited Airlines
24h 30mSIN-DEN
25-1Sat
multi-stopUnited Airlines
45h 35mDEN-SIN
S$ 1,408
21-1Tue
multi-stopUnited Airlines
24h 30mSIN-DEN
25-1Sat
multi-stopUnited Airlines
22h 25mDEN-SIN
S$ 1,409
21-1Tue
multi-stopUnited Airlines
27h 00mSIN-DEN
25-1Sat
multi-stopUnited Airlines
47h 45mDEN-SIN
S$ 1,483
21-1Tue
multi-stopCathay Pacific
27h 36mSIN-DEN
25-1Sat
multi-stopCathay Pacific
29h 27mDEN-SIN
S$ 3,804

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Everything you need to know for your flight to Boulder

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