MHT to MDW flight delays
Manchester, NH (MHT) Chicago, IL (MDW) · 838 miles
518 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
87.5%
Arrived on time
Within 15 minutes of schedule
0.97%
Cancelled
Share of scheduled flights
69 min
When late, late by
Average across delayed arrivals
9 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The season swings this route hard. In September it ran 25.8 points more punctual than in December — a difference bigger than the one between the best and worst airlines on most routes. If the date is flexible, it is worth more than the carrier.
The two directions do not behave alike. MDW to MHT arrives on time 12.7 points less often than the outbound. Delay accumulates through the flying day, so whichever direction is scheduled later tends to carry the worse record — which is an argument for booking the morning departure if the choice exists.
Flights from Manchester to Chicago keep to schedule more reliably than most. On a route this punctual the day you fly matters more than the airline you pick.
Only Southwest Airlines flies this route in the published record, so there is no choice to weigh — the route's figures and the airline's are the same figures.
Which airline should you fly on this route?
Over January 2025 – August 2026, Southwest Airlines arrived on time most often on MHT to MDW. Flights ran closest to schedule in September and worst in December.
Every airline on MHT to MDW
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| Southwest Airlines | 518 | 87.5% | 0.97% | 69 min | A |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
MDW to MHT Chicago back to Manchester 74.8% on time DCommon questions
Are flights from Manchester to Chicago usually delayed?
87.5% of flights on the MHT to MDW route arrived within 15 minutes of schedule, so roughly 1 in every ten arrived late. That is better than the average route in this record.
Which airlines fly from Manchester to Chicago?
Only Southwest Airlines appears in the published record on this route, with 518 flights and 87.5% arriving on time.
How often are MHT to MDW flights cancelled?
0.97% of scheduled flights did not operate — about 10 in every thousand. That is in the normal range.
What is the best month to fly Manchester to Chicago?
September, when 98.2% of flights arrived on time. The worst was December at 72.4%.
When MHT to MDW flights are late, how late are they?
About 69 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on MHT to MDW during January 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →