How long is the YX4537 flight?

The timetable allows 1 h 33 min. Chicago to St. Louis is 415 km (258 mi).

Which terminal does YX4537 use?

It usually leaves from Terminal 3 at Chicago O'Hare International Airport (ORD) and arrives at Terminal 1 at St. Louis Lambert International Airport (STL). Check the flight card above for today's terminal and gate.

What other flight numbers does YX4537 have?

Also listed as RPA4537 (Republic Airlines' ICAO code) and YX 4537.

YX4537 Flight Status Republic Airlines: Chicago to St. Louis (RPA4537)

Are you looking for the November 9th, 2026 YX 4537 Chicago to San Antonio flight? Go to our YX4537 Chicago to San Antonio Flight Status page >

YX 4537 Chicago to St. Louis Flight Status

Not scheduled today (November 9th, 2026). Latest flight: August 4th, 2026 ; recent history is in the table below.

YX 4537 Flight Status & Schedule Republic Airlines Chicago to St. Louis

Date	From	To	Departure	Arrival	Status	Details
Aug 04	ORD	STL	15:07	16:40	Scheduled	Track >
Aug 03	ORD	STL	15:07	16:40	Scheduled	Track >
Aug 02	ORD	STL	15:40	17:13	Scheduled	Track >
Aug 01	ORD	STL	15:15	16:48	Scheduled	Track >
Jul 31	ORD	STL	16:13	17:46	Scheduled	Track >

Republic Airlines operates YX 4537 from Chicago to St. Louis, a 415 km (258 mi) trip. The timetable allows 1 h 33 min; there is not enough recent history yet to say how long it usually takes. It is not flying today; the last flight was scheduled on 4 August 2026.

< All Chicago ORD Departures All St. Louis STL Arrivals >

About YX 4537

Route: Chicago O'Hare International Airport ORD to St. Louis Lambert International Airport STL
Distance: 415 km (258 mi)
Scheduled flight time: 1 h 33 min
Usually departs from: Terminal 3

YX 4537 FAQ

How long is the YX4537 flight?: The timetable allows 1 h 33 min. Chicago to St. Louis is 415 km (258 mi).
Which terminal does YX4537 use?: It usually leaves from Terminal 3 at Chicago O'Hare International Airport (ORD) and arrives at Terminal 1 at St. Louis Lambert International Airport (STL). Check the flight card above for today's terminal and gate.
What other flight numbers does YX4537 have?: Also listed as RPA4537 (Republic Airlines' ICAO code) and YX 4537.

YX4537 and Chicago ORD to St. Louis STL Flights

Flight YX4537 is code-shared by 5 airlines using the flight numbers AS6528, BA5150, EI7560, GF6745, JL7682

Other flights departing from Chicago ORD: AA1913, AA2064, YX4745

Other flights arriving at St. Louis STL: G74581, AA2712, AA2714, AA2731

All flights connecting Chicago ORD to St. Louis STL.