Denver to Sofia flights
Routavio compares airline fares from several flight booking sites. The lowest one-way fare it found for Denver to Sofia is €282 with Frontier Airlines (checked on 22 Oct 2026).
Your next trip, last seen at €282
Lowest observedFrontier Airlines · 3 stops · One wayWhen to fly
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The lowest fare we observed for each month. Open a month to see its days, then pick your outbound and return. A day with no price is one we will search for you.
One-way fare
- Lowest observed
- €282, departing 14 Nov 2026 (Last checked: 22 Oct 2026)One-way fareCheck live prices for this route
- Airlines seen
- Air Canada, Alaska Airlines, Bulgaria Air, easyJet, Frontier Airlines, Icelandair, JetBlue, Ryanair, Turkish Airlines, United Airlines (10)
- Typical journey time
- 33h 55m
About this route
Explore the fares we observed from Denver to Sofia. Prices move often, so pick your dates to see the latest options.
- Route distance
- 9,477 km
- Typical journey time
- 33h 55m
- Seen on fares with a connection
- Icelandair, Frontier Airlines, United Airlines, Ryanair, Turkish Airlines, JetBlue, Air Canada, easyJet (8)
- Alternative airports
- APA
Route-level information; individual journeys vary.
We have not observed non-stop service on this route; the fares shown include at least one stop.
A clearer picture of your fare
If the observed fare for this date drops, we will email you. At most one message a day.
Airport to city: straight-line distance
- Denver International Airport (DEN) → Denver, city gazetteer reference point (39.7392, -104.9847): ≈ 30 km.
- Sofia Airport (SOF) → Sofia, city gazetteer reference point (42.6977, 23.3219): ≈ 7 km.
Approximate distances calculated from coordinates, not road distances or travel times. These airports serve the city; they are not confirmed endpoints of an offer.
Lowest one-way fare we saw per airline
Cheapest airline from Denver to Sofia: Frontier Airlines, from €282 (checked 22 Oct 2026).
| Airline | Lowest fare | Priced days |
|---|---|---|
| Frontier Airlines | €282Nov 14, 2026 | 11 |
| Ryanair | €287Nov 26, 2026 | 10 |
| Icelandair | €294Nov 24, 2026 | 38 |
| JetBlue | €380Jan 21, 2027 | 4 |
| Turkish Airlines | €438Jan 4, 2027 | 3 |
| United Airlines | €443Jan 3, 2027 | 3 |
| Air Canada | €455Nov 4, 2026 | 3 |
One-way fares checked in the last 14 days. An airline listed here had a fare on at least 3 departure days. Each figure is the lowest we saw, not a guaranteed fare. Connecting itineraries are included; the date is the departure day of that fare.
Frequently asked
How much is a flight from Denver to Sofia?
The lowest fare Routavio has observed is €282, found on 22 Oct 2026. Prices move, so read it as a floor rather than a quote.
When is the cheapest month to fly from Denver to Sofia?
In our observations November 2026 is the cheapest month so far, at €282.
Are there direct flights from Denver to Sofia?
Our data holds no non-stop flight from Denver to Sofia. The fares on this page include at least one stop.
Which airlines fly from Denver to Sofia?
Routavio has seen these carriers on the route: Air Canada, Alaska Airlines, Bulgaria Air, easyJet, Frontier Airlines, Icelandair, JetBlue, Ryanair, Turkish Airlines, United Airlines (10).
How long does the flight from Denver to Sofia take?
Across the 77 fares Routavio observed, the average journey time is 34h 19m, including any stops. Individual departures vary; the fastest observed flight is listed in the route facts above.
How many of the observed Denver to Sofia fares were non-stop?
None of the 78 fares we observed was non-stop; every one included at least one stop. That describes our observations, not every flight that operates.
Which airline has the lowest fare from Denver to Sofia?
Cheapest airline from Denver to Sofia: Frontier Airlines, from €282 (checked 22 Oct 2026).
How observed prices work, what "No data" means and what a fare includes: Read the flight price guide · Price and schedule freshness on Routavio
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Recently observed fares. Prices may change.