Flight AA421
Flight AA421 is a flight number used by American Airlines between Boston (BOS) and Chicago (ORD), a great-circle distance of about 1,391 km.
About flight AA421Flight AA421
AA421 is a flight number used by American Airlines between Boston Logan International Airport (BOS) and O'Hare International Airport (ORD), about 1,391 km apart. This page collects the flight number, airline, route and the two airports for quick lookup.
The flight index does not include departure or arrival times, aircraft or operating dates; confirm schedules, check-in and boarding times with the airline or airport.
Boston → Chicago routeRoute
BOS → ORD · 1,391 km
Departure and arrival airportsAirports
The airports this flight connects. Airports the directory covers open their own page.
Flight detailsFlight details
Routes under this flight numberAll routes
This number appears on 6 routes; one number can be reused by codeshare partners.
| Route | Airline | Distance |
|---|---|---|
| BOS → ORDBoston → Chicago | American Airlines | 1,391 km |
| DFW → SYRDallas-Fort Worth → Syracuse | American Airlines | 2,148 km |
| LAS → LAXLas Vegas → Los Angeles | American Airlines | 380 km |
| LAX → LASLos Angeles → Las Vegas | American Airlines | 380 km |
| NAS → DCANassau → Washington | American Airlines | 1,536 km |
| ORD → PVRChicago → Puerto Vallarta | American Airlines | 2,873 km |
Frequently asked questionsQuestions
Flight number, airline and route from the aviability.com flight index (snapshot October 26, 2026); departure and arrival times are not included. Source: aviability.com ↗