$516 Find Cheap Flights from Colorado to Bulgaria

1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Bulgaria

Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 20% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Useful Info

Good to know

Low seasonDecember
High seasonAugust
Cheapest flight$516
Best time to beat the crowds but there is an average 36% increase in price.
Most popular time to fly and prices are also 21% lower on average.
Flight from Denver to Sofia

FAQs for booking flights from Colorado to Bulgaria

  • How does KAYAK find such low prices on flights from Colorado to Bulgaria?

    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 from Colorado to Bulgaria.

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

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

  • What is the Hacker Fare option on flights from Colorado to Bulgaria?

    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 from Colorado to Bulgaria 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 from Colorado to Bulgaria?

    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 from Colorado to Bulgaria up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest day to fly to Bulgaria?

    Based on KAYAK data, the cheapest day to fly to Bulgaria is Thursday where round-trip tickets can be as cheap as $781. On the other hand, the most expensive day to fly is Saturday, where round-trip prices are $1,343 on average.

  • What is the cheapest time of day to fly to Bulgaria?

    The cheapest time of day to fly to Bulgaria is generally at night, when round-trip flights cost $784 on average. Morning departures are around 18% more expensive than evening flights, on average. The most expensive time of day to fly to Bulgaria is generally in the morning, which is peak travel time and where the average cost of a ticket is $1,319.

  • What is the cheapest month to fly from Colorado to Bulgaria?

    The cheapest month for flights from Colorado to Bulgaria is April, when tickets cost $535 (return) on average. On the other hand, the most expensive months are May and July, when the average cost of round-trip tickets is $1,282 and $1,265 respectively.

  • How far in advance should I book a flight from Colorado to Bulgaria?

    To get a below average price on the flight from Colorado to Bulgaria, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 8 weeks before departure.

  • How long is the flight to Bulgaria?

    An average nonstop flight from Colorado to Bulgaria takes 22h 18m, covering a distance of 5957 miles. The shortest route is Denver (DEN) to Sofia (SOF) with an average flight time of 17h 25m.

  • What are the most popular destinations in Bulgaria?

    Based on KAYAK flight searches, the most popular destination is Sofia (92% of total searches to Bulgaria). The next most popular destination is Varna (8%).

Book cheap flights from Colorado to Bulgaria

Recent round-trip flight deals

10/28Tue
1 stopUnited Airlines
17h 25mDEN-SOF
12/5Fri
2 stopsUnited Airlines
22h 50mSOF-DEN
$600
7/16Wed
1 stopTurkish Airlines
15h 35mDEN-SOF
7/29Tue
1 stopTurkish Airlines
35h 20mSOF-DEN
$606
10/28Tue
1 stopLufthansa
17h 00mDEN-SOF
12/5Fri
1 stopLufthansa
17h 30mSOF-DEN
$610
8/27Wed
1 stopLufthansa
17h 25mDEN-SOF
9/10Wed
1 stopLufthansa
18h 20mSOF-DEN
$679
8/27Wed
2 stopsAir Canada
18h 30mDEN-SOF
9/10Wed
2 stopsAir Canada
24h 08mSOF-DEN
$690
9/4Thu
2 stopsAir Canada
18h 25mDEN-SOF
9/9Tue
2 stopsAir Canada
22h 34mSOF-DEN
$740
7/29Tue
2 stops
23h 10mDEN-SOF
8/5Tue
1 stop
36h 05mSOF-DEN
$837
8/10Sun
3 stops
20h 55mDEN-SOF
8/13Wed
3 stops
40h 38mSOF-DEN
$1,199
9/16Tue
2 stopsAustrian Airlines
18h 35mDEN-SOF
10/7Tue
2 stopsAustrian Airlines
20h 54mSOF-DEN
$4,836
9/16Tue
2 stopsAustrian Airlines
15h 15mDEN-SOF
10/7Tue
2 stopsAustrian Airlines
19h 40mSOF-DEN
$4,878

Search by stops

Search by airline

Search by price

Recent one-way flight deals

9/10Wed
1 stopLufthansa
17h 25mDEN-SOF
$516
9/10Wed
1 stopUnited Airlines
19h 51mDEN-SOF
$519
9/10Wed
2 stopsUnited Airlines
23h 15mDEN-SOF
$520

Search by stops

Search by airline

Search by price

Everything you need to know for your flight to Bulgaria

Cabin class types available on flights to Colorado

Cabin classes available on flights to Colorado. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.
First Class flights to Bulgaria
Business Class flights to Bulgaria
Prem Econ Class flights to Bulgaria
Economy Class flights to Bulgaria

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.