Seattle to Saint Louis (STL): December 2026 flight deals

Compare trip dates and fares.

Choose travelers and dates

Round-trip fare examples

Search a trip for current prices and flight details.

Round-trip totals in USD for 1 adult · Economy.

DestinationTrip datesDaysAxel MemberAirline fareStopsObservedSearch
Saint Louis (STL)Dec 1–3, 20262$199$2221 stopSeptember 17, 2026Search for 1 adult · Dates · Travelers
Saint Louis (STL)Dec 1–23, 202622$252$2821 stopSeptember 16, 2026Search for 1 adult · Dates · Travelers
Saint Louis (STL)Dec 3–6, 20263$203$2271 stopSeptember 17, 2026Search for 1 adult · Dates · Travelers
Saint Louis (STL)Dec 4–6, 20262$203$2271 stopSeptember 17, 2026Search for 1 adult · Dates · Travelers
Saint Louis (STL)Dec 10–13, 20263$203$2271 stopSeptember 17, 2026Search for 1 adult · Dates · Travelers
Saint Louis (STL)Dec 11–13, 20262$203$2271 stopSeptember 17, 2026Search for 1 adult · Dates · Travelers
Saint Louis (STL)Dec 11–14, 20263$203$2271 stopSeptember 17, 2026Search for 1 adult · Dates · Travelers
Saint Louis (STL)Dec 15–17, 20262$203$2271 stopSeptember 17, 2026Search for 1 adult · Dates · Travelers
Saint Louis (STL)Dec 20–25, 20265$329$3681 stopSeptember 17, 2026Search for 1 adult · Dates · Travelers
Saint Louis (STL)Dec 21–23, 20262$288$3211 stopSeptember 17, 2026Search for 1 adult · Dates · Travelers
Saint Louis (STL)Dec 24, 2026–Jan 3, 202710$339$3781 stopSeptember 17, 2026Search for 1 adult · Dates · Travelers
Saint Louis (STL)Dec 30, 2026–Jan 3, 20274$339$3781 stopSeptember 17, 2026Search for 1 adult · Dates · Travelers

Non-members can also book and save on airline fares. Live search shows prices with and without Membership. Optional Membership: $15 for the first month, then $10/month. Cancel anytime.

More flight comparisons from Seattle

Browse this trip by month

AI assistants can follow these links to compare prices without an account, API key or connector. Flight search guide

Browse flight destinations