Route profile
SFO→IND
Flight reliability, delays and best times to fly from San Francisco to Indianapolis, 1,943 miles.
Right now
Aviation weather is not currently a factor.
Aviation weather is not currently a factor.
Route reliability
July 2023 – July 2026
Better than 79% of comparable major US routes (4,598 compared)
Calculated from 1,436 flights. How this is calculated · What counts as on time
SFO → IND arrives on time 81.0% of the time; the return trip, IND → SFO, arrives on time 79.5% of the time.
SFO → IND spends 31.0 minutes on the ground on a 1,943-mile trip: 23.8 minutes from pushback to wheels-up at SFO and 7.2 minutes from touchdown to gate at IND.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
What stands out
Which day you fly matters unusually much here, a wider weekday spread than 91% of 4,467 comparable routes.
86.6% on time on a typical Tuesday, against 72.9% on a Thursday.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · Ranked against every other route with the same kind of figure and at least 4,467 in the comparison.
What sets this route apart
Where SFO to IND differs most from similar routes by hour, weekday, month and airline, July 2023 – July 2026.
SFO to IND is at its best against routes of similar length for flights scheduled at 11 AM: 85.9% arrive on time, 7.8 points ahead of the 78.1% those routes manage at that hour.
SFO to IND holds up on Fridays better than routes of similar length do: 83.3% on time to their 76.7%, a 6.6 points lead. Against all other routes the gap is 7.1 points.
June is kinder to SFO to IND than to routes of similar length: 82.3% on time against 73.1%, 9.2 points better. Against all other routes the gap is 9.6 points.
SFO to IND against comparable routes
July 2023 – July 2026| Measure | This route | Compared with | Them | Gap | Flights behind it |
|---|---|---|---|---|---|
| Hour: 11 AM departures | 85.9% | routes of similar length | 78.1% | +7.8 pts | 227 here, 63,596 there |
| Weekday: Friday | 83.3% | routes of similar length | 76.7% | +6.6 pts | 209 here, 165,115 there |
| Month: June | 82.3% | routes of similar length | 73.1% | +9.2 pts | 130 here, 100,262 there |
Each comparison pools the flights of other routes, with this route’s own left out. Similar length means within 15% of this route’s 1,943 miles, with at least 5 such routes. A bucket is set against the most comparable group that has enough flights: similar length, then the same origin (at least 3 routes), then all other routes. Hours, weekdays and months appear only where both sides have 120 completed flights, and airlines where both have 600. The gap must be at least 2 points and 2 standard errors, and only the largest gap each way is kept per measure. These are differences in the flights counted, not causes.
When it goes wrong
July 2023 – July 2026
35 min late
against a median of 6 min early
Percentiles over 1,436 operations; cancelled and diverted flights are counted separately.
Will your connection be tight enough?
Layovers at IND after arriving from SFO.
| Connection time | Chance of missing | Reads as |
|---|---|---|
| 30 min | 37% | Likely to miss |
| 45 min | 18% | High risk |
| 60 min | 12% | Some risk |
| 90 min | 5.6% | Some risk |
| 120 min | 2.7% | Low risk |
This is one leg of a connection. Gate changes and the next flight's own schedule matter too. And a connection can fail before delay is even the question — this route cancels 0.56% of the time and diverts 0.35% of the time, which a late arrival never shows up in.
Chance of missing is the share of 1,423 arrivals on this route that landed later than the connection time less 30 minutes to reach the next gate.
The worst tenth of arrivals on this route land at least 35 minutes late (90th-percentile gate arrival delay), over 1,436 operations.
Any other layover length: connection checker.
Best time to fly
SFO → IND flights departing 9 AM–12 PM arrived on time 85.5% of the time, against 75.1% for 3–6 PM departures, a gap of 10.4 percentage points.
By departure window
By departure hour
- 12 AM to 8 AM: too few flights to score
- 9 AM: 83.2% on time from 146 flights
- 10 AM: too few flights to score
- 11 AM: 85.9% on time from 229 flights
- 12 PM to 3 PM: too few flights to score
- 4 PM: 75.1% on time from 194 flights
- 5 PM to 9 PM: too few flights to score
- 10 PM: 81.7% on time from 244 flights
- 11 PM: 82.7% on time from 316 flights
Departure windows with fewer than 120 flights are not scored.
Why SFO → IND runs late
July 2023 – July 2026
the inbound aircraft was late, so this flight started late
crew, maintenance, boarding and fueling, all within the carrier’s control
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for SFO → IND. Only delays of 15 minutes or more are attributed. What the five causes mean
Late-arriving aircraft is the largest cause on SFO → IND, at 54.7%: flights here mostly leave late because the plane came in late, and the day shows it: 9 AM–12 PM departures arrived on time 85.5% of the time and 3–6 PM departures 75.1%.
Airlines on this route
Carriers with at least 200 flights, by the airline that operated each one.
| Carrier | Flights | On time | Cancelled | Median delay | Severe |
|---|---|---|---|---|---|
| United Airlines | 1,436 | 81.0% | 0.56% | -6 min | 5.6% |
Weekly and seasonal patterns
By day of week
Tuesday is historically the most reliable day and Thursday the least, a gap of 13.7 percentage points.
Reliability over time
July 2023 – July 2026
Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 80.8% against 84.3% in the 12 months before — declining by 3.5 percentage points.
Data and methodology
Calculated by FlyerIntel from 1,436 SFO → IND flight records from the US DOT Bureau of Transportation Statistics, covering July 2023 – July 2026. Late means 15 or more minutes past scheduled arrival; cancelled and diverted flights are left out of on-time rates.
Full methodology · Data sources · Report a problem
Related research: How Long a Layover Needs to Be · Two Airlines on One Route · Best Time of Day to Fly From Major US Airports
Analysis last recomputed