Flights Seattle → Miami — September 19, 2026

One way · Economy · 1 adult · price per person

The cheapest itinerary observed for Saturday, September 19, 2026 on the Seattle–Miami route: 1 stop itinerary (2 flights) via Denver International (DEN), from Seattle-Tacoma (SEA) to Miami International (MIA), first flight Frontier Airlines F93406, departs 4:27 PM, arrives 12:46 AM 2 days later, total travel time 29h 19m including layovers, flight time 6h 44m (layovers excluded), $181 per person. Fare as listed by Aviasales: carry-on bag not included (personal item only), checked bag not included, changes not allowed, non-refundable. Price found in an Aviasales search on September 9, 2026 and read by AirSource on September 10, 2026, 20:47 UTC: it is not guaranteed and is confirmed on Aviasales at booking time. The cheapest direct flight observed: Alaska Airlines AS305, from Seattle-Tacoma (SEA) to Miami International (MIA), departs 8:00 AM, arrives 5:13 PM, direct, 6h 13m, $304 per person. Fare as listed by Aviasales: carry-on bag included, checked bag not included, changes not allowed, non-refundable.