KMDW Chicago Midway Intl

31R

CONFIRMED 99%

Runway 31R — assigned by ATIS (information Q)

certainty: 99% evidence: STRONG towered now Class C

Wind calm · VFR · 23 min old · from KDPA (23.3 nm away)

▶ Listen live — ATIS/CTAF on LiveATC opens LiveATC’s own player · verify the broadcast yourself

31R 99% 6522 ft

13L <1% 6522 ft

13R CLOSED 3859 ft

22L CLOSED 6445 ft

22R CLOSED 5507 ft

31L CLOSED 3859 ft

4L CLOSED 5507 ft

4R CLOSED 6445 ft

Active NOTAMs affecting runways

RWY CLOSED RWY 13R/31L until 10-09 11:00Z

RWY 13R/31L CLSD EXC TAX

RWY CLOSED RWY 4L/22R until 10-09 11:00Z

RWY 04L/22R CLSD EXC TAX

RWY CLOSED RWY 4R/22L until 10-09 10:00Z

RWY 04R/22L CLSD

LIGHTING RWY 4R until 10-15 23:59Z

RWY 04R RWY END ID LGT U/S

Why — evidence behind this answer

Runway 31R

ATIS ATIS (info Q) names 31R for arrivals 18 min ago +3.80
PRIOR 31R used 25% of the time in this wind bin (n=12) -0.06

Runway 13L

ATIS 13L not named for arrivals on current ATIS 18 min ago -1.90

Runway 13R

NOTAM 13R not considered — closed by NOTAM until 1100Z 09 Oct

Runway 22L

NOTAM 22L not considered — closed by NOTAM until 1000Z 09 Oct

Runway 22R

NOTAM 22R not considered — closed by NOTAM until 1100Z 09 Oct

Runway 31L

NOTAM 31L not considered — closed by NOTAM until 1100Z 09 Oct

Runway 4L

NOTAM 4L not considered — closed by NOTAM until 1100Z 09 Oct

Runway 4R

NOTAM 4R not considered — closed by NOTAM until 1000Z 09 Oct

Sources consulted

source	status	age	note
D_ATIS	OK	18 min
METAR	OK	23 min	Nearest station KDPA (23.3 nm away)
ADSB	OK	1 min	GOOD
NOTAM	OK
CIFP	NOT_CONFIGURED		Instrument procedures: phase 4

Recent operations

No operations observed in the last hour.

Was this right?

KMDW field & runways

Chicago Midway Intl, Chicago, Illinois. Field elevation 620 ft. Class C airspace. Towered. Magnetic variation 4.0°W on record, 4.1°W today.

The FAA's variation of record is the number this field was surveyed against; the second is where north points now, from WMM2025. It is moving 0.031°/year west — about 1° every 32 years — which is why runway numbers eventually stop matching their pavement.

Runway data from the FAA NASR 01 Oct 2026 cycle. Where NASR locates both thresholds, the true heading is the bearing between them rather than NASR's whole-degree alignment. Magnetic is that heading against *today's* declination from WMM2025, not the field's variation of record — so it can differ from the chart by the gap between the two shown above. The number painted on the runway is the one ATC uses.
Runway	True	Magnetic	Number	Length	Surface	Pattern	Notes
13L	133.7°	137.7°	runway 14 by the rule today · 7.7° past	6,522 ft	ASPH-CONC	left	ILS
13R	133.7°	137.8°	runway 14 by the rule today · 7.8° past	3,859 ft	ASPH		CLOSED
22L	223.4°	227.5°	runway 23 by the rule today · 7.5° past	6,445 ft	ASPH-CONC	left	CLOSED
22R	223.4°	227.4°	runway 23 by the rule today · 7.4° past	5,507 ft	ASPH	left	CLOSED
31L	313.7°	317.8°	runway 32 by the rule today · 7.8° past	3,859 ft	ASPH		CLOSED
31R	313.7°	317.7°	runway 32 by the rule today · 7.7° past	6,522 ft	ASPH-CONC	left	ILS
4L	43.4°	47.4°	runway 5 by the rule today · 7.4° past	5,507 ft	ASPH	left	CLOSED
4R	43.4°	47.5°	runway 5 by the rule today · 7.5° past	6,445 ft	ASPH-CONC	left	ILS CLOSED

What KMDW usually does

Of 2,951 operations this service has observed at KMDW since 2026-08-25:

22L 47% 1397 ops
4R 32% 940 ops
31R 7% 218 ops
13L 6% 169 ops
4L 3% 98 ops
22R 3% 86 ops
31L 1% 26 ops
13R 1% 17 ops

Observed by this service only — not an FAA statistic, and biased toward the hours and days it has been watching. It is shown because it is the same history the engine learns its local-convention prior from.

Generated 09:15:01Z · auto-refreshes · JSON

KMDW ☆ Chicago Midway Intl