Flying a bike from Seattle to Denver

No airline checks a bike for free on this route. Cheapest: United, ~$45–50 per bike each way.

Nonstop: United from SEA, Delta from SEA, Alaska from SEA, Southwest from SEA and Frontier from SEA. Prices are per bike, each way, within the US. Checked October 1, 2026.

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Airline	Bike, each way	Good to know
United	~$45–50	Nonstop
Delta	$45	Nonstop
Alaska	$45	Nonstop, No overweight fee to 70 lb
Southwest	$45	Nonstop
Frontier	$100	Nonstop

Free means the bike counts as one of your checked bags. Basic and Light fares often don't include a free bag. Open an airline for its rules.

Quick answers

Which airlines fly a bike for free from Seattle to Denver?

None of the airlines in this guide fly a bike for free on this route.

How much does it cost to fly a bike from Seattle to Denver?

Paid options range from ~$45–50 (United) to $100 (Frontier) per bike, each way.

Is there a nonstop flight from Seattle to Denver?

Nonstop: United from SEA, Delta from SEA, Alaska from SEA, Southwest from SEA and Frontier from SEA.