Route guide

St. Louis to Boston (STL-BOS): Nonstop Upgrade & Award Space

American Airlines and Southwest Airlines fly nonstop between St. Louis (STL) and Boston (BOS), roughly 16 times a week. Because so many carriers compete on this route, premium seats turn over daily, and upgrade or award space can open and close within hours. 2LNR tracks confirmed availability on every STL to BOS departure, so you know which flights have space before you book.

Data current as of July 21, 2026, refreshed on an ongoing basis as new schedules and seats are confirmed.

See STL to BOS on the interactive map Get started free
16
Nonstop flights a week
1,044 mi
Nonstop distance
Free
To get started

Confirmed upgrade & award space on every STL to BOS departure

2LNR tracks confirmed upgrade and award availability on American, Delta, and Alaska and across 30 airlines, segment by segment, date by date. Open the calendar for St. Louis to Boston to see which departures have real space, or watch the route and get alerted when space opens.

See real availability

Confirmed upgrade and award seats on each STL to BOS departure, checked against live inventory so you know what is open before you book.

Set an alert

Premium inventory turns over fast. Watch this route and 2LNR notifies you when space appears on a date you are tracking.

Plan on the map

See STL to BOS on the interactive route map, with schedules, connections, and route statistics.

Airlines flying St. Louis to Boston nonstop

Carriers operating STL to BOS nonstop in the current schedule. 2LNR tracks confirmed upgrade and award space on each of them.

  • American Airlines
  • Southwest Airlines
See STL to BOS on the interactive map →

Frequently asked questions about STL to BOS

How far is Boston from St. Louis?
STL to BOS covers about 1,044 miles nonstop. Flight times vary by aircraft and season; each scheduled departure on this page lists its own times.
Which airlines fly nonstop from STL to BOS?
American Airlines and Southwest Airlines fly the route nonstop. 2LNR tracks confirmed upgrade and award space on both of them.
How many flights a week are there from STL to BOS?
About 16 nonstop flights a week run between St. Louis and Boston in the current schedule, operated by American Airlines and Southwest Airlines. Frequency shifts by season; the calendar on this page reflects what's currently scheduled.
How do I check upgrade or award availability on STL to BOS?
Open the STL to BOS calendar on this page to see confirmed upgrade and award space by date. You can also set an alert on the St. Louis to Boston route, and 2LNR will notify you when space opens. It's free to start.

Never miss STL to BOS upgrade or award space

Track confirmed availability, set alerts, and book with confidence. Free to start, no credit card required.

Get started free