Flight MQ4135

Envoy Air flight MQ4135

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Looking for MQ4135 in the air…

Chicago (ORD) to Tulsa (TUL)

Historically, this flight arrives 15+ minutes late 9% of the time, and when it is late the delay averages 50 minutes. It was cancelled 0.0% of the time.

On-time arrivals

90.8%

Less than 15 minutes late

Cancelled

0.0%

Of scheduled flights

Average delay when late

50 min

Flights arriving 15+ minutes late

Flights tracked

76

Scheduled flights in the period

What caused the delays

• Late-arriving aircraft 67%
• Airline (crew, maintenance, cleaning) 25%
• Air traffic control & airport 7%
• Extreme weather 0%
• Security 0%

Share of delay minutes airlines attributed to each cause (BTS).

Tulsa (TUL) to Chicago (ORD)

Historically, this flight arrives 15+ minutes late 20% of the time, and when it is late the delay averages 94 minutes. It was cancelled 1.3% of the time.

On-time arrivals

79.7%

Less than 15 minutes late

Cancelled

1.3%

Of scheduled flights

Average delay when late

94 min

Flights arriving 15+ minutes late

Flights tracked

76

Scheduled flights in the period

What caused the delays

• Extreme weather 49%
• Airline (crew, maintenance, cleaning) 21%
• Late-arriving aircraft 17%
• Air traffic control & airport 13%
• Security 0%

Share of delay minutes airlines attributed to each cause (BTS).

St Louis (STL) to Chicago (ORD)

Historically, this flight arrives 15+ minutes late 16% of the time, and when it is late the delay averages 352 minutes. It was cancelled 0.0% of the time.

On-time arrivals

83.7%

Less than 15 minutes late

Cancelled

0.0%

Of scheduled flights

Average delay when late

352 min

Flights arriving 15+ minutes late

Flights tracked

43

Scheduled flights in the period

What caused the delays

• Late-arriving aircraft 64%
• Extreme weather 35%
• Airline (crew, maintenance, cleaning) 1%
• Air traffic control & airport 0%
• Security 0%

Share of delay minutes airlines attributed to each cause (BTS).

Charlotte (CLT) to Rapid City (RAP)

Historically, this flight arrives 15+ minutes late 3% of the time, and when it is late the delay averages 219 minutes. It was cancelled 0.0% of the time.

On-time arrivals

97.0%

Less than 15 minutes late

Cancelled

0.0%

Of scheduled flights

Average delay when late

219 min

Flights arriving 15+ minutes late

Flights tracked

33

Scheduled flights in the period

What caused the delays

• Late-arriving aircraft 100%
• Airline (crew, maintenance, cleaning) 0%
• Air traffic control & airport 0%
• Extreme weather 0%
• Security 0%

Share of delay minutes airlines attributed to each cause (BTS).

Rapid City (RAP) to Charlotte (CLT)

Historically, this flight arrives 15+ minutes late 9% of the time, and when it is late the delay averages 73 minutes. It was cancelled 0.0% of the time.

On-time arrivals

90.9%

Less than 15 minutes late

Cancelled

0.0%

Of scheduled flights

Average delay when late

73 min

Flights arriving 15+ minutes late

Flights tracked

33

Scheduled flights in the period

What caused the delays

• Airline (crew, maintenance, cleaning) 65%
• Air traffic control & airport 35%
• Late-arriving aircraft 0%
• Extreme weather 0%
• Security 0%

Share of delay minutes airlines attributed to each cause (BTS).

Sioux Falls (FSD) to Phoenix (PHX)

Historically, this flight arrives 15+ minutes late 31% of the time, and when it is late the delay averages 68 minutes. It was cancelled 0.0% of the time.

On-time arrivals

69.2%

Less than 15 minutes late

Cancelled

0.0%

Of scheduled flights

Average delay when late

68 min

Flights arriving 15+ minutes late

Flights tracked

26

Scheduled flights in the period

What caused the delays

• Airline (crew, maintenance, cleaning) 72%
• Air traffic control & airport 24%
• Late-arriving aircraft 4%
• Extreme weather 0%
• Security 0%

Share of delay minutes airlines attributed to each cause (BTS).

Dallas-Fort Worth (DFW) to Mobile (MOB)

Only 7 flights on record, which is too few for reliable odds.

On-time arrivals

85.7%

Less than 15 minutes late

Cancelled

0.0%

Of scheduled flights

Average delay when late

40 min

Flights arriving 15+ minutes late

Flights tracked

7

Scheduled flights in the period

What caused the delays

• Airline (crew, maintenance, cleaning) 100%
• Late-arriving aircraft 0%
• Air traffic control & airport 0%
• Extreme weather 0%
• Security 0%

Share of delay minutes airlines attributed to each cause (BTS).

Mobile (MOB) to Dallas-Fort Worth (DFW)

Only 7 flights on record, which is too few for reliable odds.

On-time arrivals

85.7%

Less than 15 minutes late

Cancelled

0.0%

Of scheduled flights

Average delay when late

85 min

Flights arriving 15+ minutes late

Flights tracked

7

Scheduled flights in the period

What caused the delays

• Security 46%
• Late-arriving aircraft 38%
• Airline (crew, maintenance, cleaning) 16%
• Air traffic control & airport 0%
• Extreme weather 0%

Share of delay minutes airlines attributed to each cause (BTS).

Charlotte (CLT) to Little Rock (LIT)

Only 1 flight on record, which is too few for reliable odds.

On-time arrivals

100.0%

Less than 15 minutes late

Cancelled

0.0%

Of scheduled flights

Average delay when late

—

Flights arriving 15+ minutes late

Flights tracked

1

Scheduled flights in the period

Little Rock (LIT) to Charlotte (CLT)

Only 1 flight on record, which is too few for reliable odds.

On-time arrivals

100.0%

Less than 15 minutes late

Cancelled

0.0%

Of scheduled flights

Average delay when late

—

Flights arriving 15+ minutes late

Flights tracked

1

Scheduled flights in the period

Sep 2025 Aug 2026

Show as table

Month	On time	Flights
September 2025	93.1%	58
October 2025	77.1%	35
November 2025	100.0%	1
February 2026	100.0%	4
March 2026	80.0%	10
April 2026	87.5%	24
May 2026	80.5%	41
June 2026	81.4%	60
July 2026	88.5%	62
August 2026	100.0%	8

Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data