Chicago (ORD) – St. Louis (STL)
- Distance
- 415 km
- 258 mi · 224 nm
- Flight time
- 1 h 23 min / 1 h 30 min
- Average gate to gate: ORD → STL / back
- Time difference
- none
- CO2 per passenger
- 95 kg
- One way, economy, incl. RF (56 kg CO2 only)
- Passengers / year
- 614,584
- Aug 2025 – Jul 2026 · +4.6%
- Flights / week
- 196
- Both directions, average
- Seats filled
- 76%
- 805,971 seats a year
- Airlines nonstop
- 6
- G7, UA, AA
Traffic: U.S. DOT, Bureau of Transportation Statistics, T-100 Segment (all carriers, scheduled service), Aug 2025 – Jul 2026. Distance: WGS-84 ellipsoid. CO2: UK DESNZ 2026 factors. Sources
The way there
- Heading from ORD
- 211°
- Heading from STL
- 29°
- Halfway point
- 40.37, -89.17
- Great-circle km
- 415 km (sphere, for EU261)
- In the air ORD → STL
- 47 min
- In the air STL → ORD
- 52 min
- Clocks
- Same time in both
The estimate for a route without real times is 1 h 15 min; how it is worked out is on Sources.
Show as a table
| Month | Passengers |
|---|---|
| Aug 2025 | 54,008 |
| Sep 2025 | 53,455 |
| Oct 2025 | 56,535 |
| Nov 2025 | 39,489 |
| Dec 2025 | 39,034 |
| Jan 2026 | 34,157 |
| Feb 2026 | 40,501 |
| Mar 2026 | 52,498 |
| Apr 2026 | 56,857 |
| May 2026 | 64,315 |
| Jun 2026 | 60,313 |
| Jul 2026 | 63,422 |
Show as a table
| Month | Flights |
|---|---|
| Aug 2025 | 800 |
| Sep 2025 | 769 |
| Oct 2025 | 826 |
| Nov 2025 | 748 |
| Dec 2025 | 742 |
| Jan 2026 | 697 |
| Feb 2026 | 767 |
| Mar 2026 | 902 |
| Apr 2026 | 985 |
| May 2026 | 1,077 |
| Jun 2026 | 928 |
| Jul 2026 | 970 |
Airlines flying ORD–STL nonstop
| Airline | Flights / week | Share of passengers |
|---|---|---|
| G7GoJet Airlines | 78 | 28% |
| UAUnited Air Lines | 22 | 20% |
| AAAmerican Airlines | 20 | 17% |
| MQEnvoy Air | 29 | 14% |
| OOSkyWest Airlines | 30 | 14% |
| YXRepublic Airline | 16 | 8% |
Both directions, Aug 2025 – Jul 2026. Airlines with at least one flight a month. U.S. DOT, Bureau of Transportation Statistics, T-100 Segment (all carriers, scheduled service). Sources
Aircraft on this route
- Bombardier CRJ550 · 4,165 flights
- Embraer ERJ-175 · 1,720 flights
- Canadair RJ-700 · 1,156 flights
- Airbus Industrie A319 · 1,003 flights
- Embraer-Emb-170 · 964 flights
- Boeing 737-800 · 431 flights
- Boeing B737 Max 800 · 228 flights
- Airbus Industrie A320-100/200 · 199 flights
Also carried: 63 tonnes of freight and 4 tonnes of mail a year (passenger and cargo flights).
Punctuality
- On time
- 72.4%
- Arrived within 15 min of schedule
- Average delay
- 24 min
- Late arrivals count, early ones as 0
- Cancelled
- 3.3%
- Flights counted
- 6,180
- Aug 2025 – Jul 2026
| Airline | On time | Average delay |
|---|---|---|
| OOSkyWest Airlines | 66.7% | 31 min |
| MQEnvoy Air | 75.4% | 19 min |
| UAUnited Air Lines | 72.3% | 23 min |
| AAAmerican Airlines | 73.7% | 29 min |
| YXRepublic Airline | 75.6% | 20 min |
Delay minutes by cause: airline 29% · aircraft arriving late 36% · air traffic system 24% · weather 10% · security 0%.
Both directions, Aug 2025 – Jul 2026. BTS Reporting Carrier On-Time Performance (US domestic flights of the larger US airlines). Sources
What passengers paid
- Average fare, Q1 2026
- $277
- One way, all cabins
- Average over a year
- $255
- Q2 2025 – Q1 2026
- Largest airline
- United Air Lines
- 57% of passengers · $293
- Lowest-fare airline
- American Airlines
- 42% of passengers · $255
History, not a price to book: what the average passenger paid per one-way trip in each quarter (Q2 2025 $251 · Q3 2025 $245 · Q4 2025 $249 · Q1 2026 $277).
Fare outlook, Q1 2027: about $283, likely $245–$322
The average fare paid we expect a year after Q1 2026, the newest DOT quarter. On this route, past forecasts made this way fell inside the range 90% of the time over 21 quarters (median error 4.7%). An estimate from US DOT data: not a price you can book, not a guarantee, not advice on when to buy. How the outlook works
Cheapest quarter on this route: Q1, typically 4% below the year's average (9 years of DOT data, without 2020–21).
U.S. DOT Consumer Airfare Report, Table 1a (airline ticket sample, US domestic airport pairs). Sources
Delay compensation (EU261 / UK261)
Measured by great-circle distance: 415 km.
Neither EU261 nor UK261 covers this route: it neither starts nor ends in the EU, EEA, Switzerland or the UK. Other countries have their own rules (for example Canada's APPR or Brazil's ANAC rules).
Also owed for a cancellation with less than 14 days' notice or denied boarding. Not owed for extraordinary circumstances. On a connection, the distance to the final destination counts. From 23 October 2027 the EU's Regulation 2026/2202 applies; it keeps these amounts (what changes in 2027). Information, not legal advice.
Every airport pair between Chicago and St. Louis
Kilometres. Linked numbers have a page of their own. All Chicago airports
More routes from ORD
| Route | Distance | Passengers / year |
|---|---|---|
| ORD → LGA | 1,180 km | 2,736,902 |
| ORD → LAX | 2,808 km | 2,332,419 |
| ORD → SFO | 2,971 km | 1,976,484 |
| ORD → DEN | 1,430 km | 1,974,190 |
| ORD → MCO | 1,617 km | 1,924,694 |
| ORD → DFW | 1,290 km | 1,916,312 |
| ORD → BOS | 1,395 km | 1,886,038 |
| ORD → EWR | 1,157 km | 1,731,402 |
| ORD → IAH | 1,489 km | 1,711,056 |
| ORD → PHX | 2,317 km | 1,706,053 |