Cheap Flights to Boulder

View ฿3,640 flight on Thu, 29 Jan 2026Opens in a new window

Popular airlines to Boulder

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Cheap round-trip flights to Boulder

Prices were available within the past 7 days and start at ฿3,640 for one-way flights and ฿7,270 for round trip, for the period specified. Be sure to select the 'Direct flights only' box above if you are looking for a non stop route. Prices and availability are subject to change. Additional terms apply.

Delta
Thu, 29 Jan - Tue, 3 Feb
SJC
San Jose
DEN
Denver
฿7,270 Return, found 1 day ago
฿7,270
Return
found 1 day ago
Select Delta flight, departing Thu, 29 Jan from San Jose to Denver, returning Tue, 3 Feb, priced at ฿7,270 found 1 day ago
United
Thu, 29 Jan - Tue, 3 Feb
SJC
San Jose
DEN
Denver
฿13,735 Return, found 1 day ago
฿13,735
Return
found 1 day ago
Select United flight, departing Thu, 29 Jan from San Jose to Denver, returning Tue, 3 Feb, priced at ฿13,735 found 1 day ago
American Airlines
Thu, 29 Jan - Tue, 3 Feb
SJC
San Jose
DEN
Denver
฿14,375 Return, found 1 day ago
฿14,375
Return
found 1 day ago
Select American Airlines flight, departing Thu, 29 Jan from San Jose to Denver, returning Tue, 3 Feb, priced at ฿14,375 found 1 day ago
Asiana Airlines
Thu, 20 Nov - Wed, 3 Dec
ICN
Seoul
DEN
Denver
฿22,235 Return, found 5 hours ago
฿22,235
Return
found 5 hours ago
Select Asiana Airlines flight, departing Thu, 20 Nov from Seoul to Denver, returning Wed, 3 Dec, priced at ฿22,235 found 5 hours ago
Korean Air
Thu, 20 Nov - Wed, 3 Dec
ICN
Seoul
DEN
Denver
฿22,385 Return, found 5 hours ago
฿22,385
Return
found 5 hours ago
Select Korean Air flight, departing Thu, 20 Nov from Seoul to Denver, returning Wed, 3 Dec, priced at ฿22,385 found 5 hours ago

Find the cheapest month to fly from Columbus (CMH) to Denver (DEN)

October is typically the cheapest month to fly

From ฿3,745 - ฿6,123 per traveller.

Flights to Boulder

Searching for cheap flights to Boulder? No travel company presents more choices than Expedia if you're looking to compare flights to Boulder. With more airlines, cheaper flights, fewer stops, and more departure and arrival times travellers should ensure they search on Expedia before any holiday to Boulder. Expedia provides the cheapest flights to Boulder and you may find even greater savings if you combine your flight to Boulder with a hotel stay. Travellers who are flexible about flight times can benefit from last minute cheap flights to Boulder.

Expedia is the largest online travel agency which means that Expedia have access to cheap airline tickets. So make sure you check Expedia regularly for these bargain flights because the cheapest airline ticket deals sell out fast.

Expedia is not only free for everyone to use but it quick and easy to use. Find the lowest flight prices guaranteed and book directly through Expedia. Browse through hundreds of cheap flight offers to find the one that suits your budget by simply inputting your travel dates. Expedia will then find the cheapest flights to Boulder for that period and let you choose your preferred time and airline.

Frequently asked questions

What is the name of Boulder's airport?
Boulder is served by just one airport, Denver Intl. Airport (DEN).
What airport is best to fly into Boulder?
Travellers from all corners of the globe go through DEN each day. Hop off the plane, get your bags and you'll be 56 kilometres from the downtown Boulder streets.
How many airlines fly to Boulder?
There are 24 air carriers that jet into Boulder from 204 airports around the world.
Which airlines fly to Boulder?
Southwest Airlines, United Airlines and Frontier Airlines are the most frequent fliers to Boulder. The majority of these flights originate in Phoenix, with Southwest Airlines having the most services on this route.
How many nonstop flights are there to Boulder?
Flying to someplace new is much easier when there aren't any lengthy stopovers. If you're travelling to Boulder, the great news is that there are around 5,892 nonstop flights operating each week.
Where are the most popular flights to Boulder departing from?
Flights to Boulder departing from Phoenix, Dallas and Salt Lake City airports are always popular.
How long is the flight to Boulder Airport?
If you're going to Boulder from Phoenix, you're looking at a flight duration of 1 hour and 51 minutes. Those departing from Dallas can expect to be in the air for 2 hours and 10 minutes. From Salt Lake City it's about 1 hour and 40 minutes away.
How to book the cheapest flight to Boulder?
We all know those fortunate travellers who somehow nab super cheap fares every time they fly. Want to know how to do it for your Boulder holiday? Don't leave it until the very last minute to lock in your flight. Don't stop there, however. Do some research and see if there are a few airports at your destination. Prices often differ depending on the airport you use. Make sure you compare prices across airlines too. And finally, remember that the early bird catches the worm. Know what a typical airfare costs and be ready to reserve your seat as soon as you spot a bargain. The best deals don't last long.
Do you have any tips for my flight to Boulder?
Wherever you're jetting in from, flying can be an enjoyable experience if you prepare well enough. We've put together a list of handy tips and tricks that will help get your Boulder escape started on the right foot. What to pack in your hand luggage:

  • Flying can be a comfortable experience if you pack the right things. Firstly, you'll need toiletry items, such as a toothbrush and some deodorant, a spare pair of socks and a few magazines. Next, find a spot in your hand luggage for your laptop, a charger, any daily medications and perhaps a proper neck pillow too. Lastly, and most importantly, don't forget to take your passport, travel documents and some money.

Do not pack the following items in your hand luggage:

  • Make sure you don't have a sharp object hiding in the bottom of your carry-on luggage. Other prohibited items include flammable or explosive products, like aerosols and matches, and liquids and gels in containers larger than 3.4 ounces (100 millilitres).

What to wear on a flight:

  • The aisles of an aircraft are no place for a fashion parade. Layer your clothing and opt for shoes that are roomy, flat and easy to remove.
  • Most of us have heard about deep vein thrombosis (DVT), a blood clotting condition caused by prolonged periods of inactivity. To minimize your risk on board, drink plenty of water, consider wearing compression socks or tights and move your lower limbs often.

How to get through airport security fast when flying to Boulder?
The secret is to be well prepared before you get to airport security. That way, you'll be stepping onto that plane to Boulder in next to no time. Follow these helpful tips and get your holiday off to a terrific start:

  • Airport security personnel first need to determine that you have a valid passport and travel documents before anything else. Have them within easy reach, ready for inspection.
  • Next up is the X-ray machine. Remove anything on you that is likely to beep. This includes items like earphones or headphones, as well as your coat or jacket. They'll all need to go on the X-ray conveyor belt.
  • For just a few minutes, you'll have to unplug from the digital world. Your phone, laptop and any other electronic devices must also go through the scanner.
  • Remove all gels and liquids from your hand luggage. They often need to be sent through the X-ray separately. Each item should be no larger than 3.4 ounces (100 millilitres) and everything must fit inside a single quart-size (one litre), clear zip-lock bag.
  • It's also possible you'll need to remove your shoes for scanning, so wearing slip-on shoes is always a clever idea.
  • Pocket knives and other sharp items can't be taken on board. They'll be confiscated at security, so put them in your checked luggage.

Flights to Boulder information
Destination airport
Denver Intl.
Destination airport IATA code
DEN
Destination city name
Denver
Return price
฿3,825

Trending flights to Boulder

Prices were available within the past 7 days and start at ฿3,640 for one-way flights and ฿7,270 for round trip, for the period specified. Be sure to select the 'Direct flights only' box above if you are looking for a non stop route. Prices and availability are subject to change. Additional terms apply.

Korean Air
Wed, 28 Jan - Wed, 4 Feb
BKK
Bangkok
DEN
Denver
฿27,245 Return, found 1 hour ago
฿27,245
Return
found 1 hour ago
Select Korean Air flight, departing Wed, 28 Jan from Bangkok to Denver, returning Wed, 4 Feb, priced at ฿27,245 found 1 hour ago
*Available to Expedia members.