As of September 2025, several airlines offer direct and connecting flights from Atlanta (ATL) to Denver (DEN). Nonstop service is available daily with a flight time of approximately 3 to 3.5 hours.
Airlines with nonstop service
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Delta Air Lines: Offers frequent daily nonstop flights.
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Southwest Airlines: Provides multiple nonstop flights per week.
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United Airlines: Operates daily nonstop service on this route.
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Frontier Airlines: Offers nonstop flights, often with the lowest fares.
Sample round-trip fares
Prices fluctuate based on the date of travel, how far in advance you book, and the airline. For example, a search for flights from late October 2025 shows:
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Frontier: From ~$10,754 (or $107)
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Southwest: From ~$14,310 (or $140)
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United: From ~$13,837 (or $137)
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Delta: From ~$17,365 (or $175)
Tips for booking
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Book in advance: Booking 2 weeks to 3 months before your trip can yield lower prices.
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Cheapest days: Flying on Tuesdays or Wednesdays is often cheaper than weekends.
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Consider low-cost carriers: For the cheapest fares, check Frontier, but be mindful of additional fees for bags and seat selection.
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Use price alerts: Websites like Google Flights and Skyscanner allow you to track prices and will notify you when fares rise or fall.
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