Houston to Chicago (IAH–ORD) — Airlines, Schedules & Connections
Flight Schedule
145 flights
Verified 12h ago
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No flights match your filters.
No nonstop flights on this route. connecting options below.
✦ 1-Stop
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Houston to Chicago
6 carriers, 436 flights/week nonstop.
6 Airlines
436 Flights/wk
926 mi
2h 13m nonstop
196 1-stop hubs
IAH–ORD is served by 6 airlines with nonstop service. United Airlines, American Airlines and Frontier lead the route. The flight covers 926 miles in approximately 2h 13m. Beyond nonstop, 196 hubs offer 1-stop connections.
Carriers on this route
Airline Landscape
All carriers operating nonstop IAH–ORD service, compared side by side.
| Airline | Freq/wk | Aircraft | Duration | Dep OTP | Alliance | Codeshares |
|---|---|---|---|---|---|---|
| UA United Airlines Also: AV, EK, NH, NZ, OS, SN | 105 | 32Q, 739, 7M9, A21N | 2h13-2h58 | Star Alliance | AV, EK, NH, NZ, OS, SN | |
| AA American Airlines Also: AS, AY, BA, CX, EI, GF, IB, JL, RJ | 65 | 319, 738, E75 | 2h17-3h24 | Oneworld | AS, AY, BA, CX, EI, GF, IB, JL, RJ | |
| F9 Frontier Also: Y4 | 11 | 321, A21N | 2h50 | – | Y4 | |
| NK Spirit Airlines | 3 | A21N | 2h29 | – | – | |
| AM Aeromexico | 0 | – | – | SkyTeam | – | |
| DL Delta Air Lines | 0 | – | – | SkyTeam | – |
Aircraft on this route
OTP based on airport-level delay snapshots. Duration ranges reflect seasonal/directional variation.
Schedule
Weekly Schedule Pattern
Nonstop flight frequency by day of week, IAH to ORD direction.
Mon
63
flights
Tue
62
flights
Wed
61
flights
Thu
63
flights
Fri
63
flights
Sat
60
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Sun
64
flights
Departure time distribution
12 AM6 AM12 PM6 PM12 AM
Morning departures
Afternoon/evening departures
69
Nonstop flights
436
Outbound / wk
459
Return / wk
Connections
Connection Landscape
Beyond nonstop. 1-stop and 2-stop options for IAH to ORD.
1-STOP
One-Stop Connections
196
Hubs
~2h
Fastest
~44h
Longest
Verified with published schedule alignment and minimum connection time.
2-STOP
Two-Stop Connections
6,513
Candidates
Two-stop connections loaded in the connections tab above.
Connections computed from published schedules with minimum connection time verification. Use the interactive explorer above the fold to filter by airline, tier, and layover time.
Alternatives
Other ways to reach Chicago from Houston
Nearby airports with service to Chicago O'Hare International Airport.
| Metric | IAH→ORD | HOU→ORD | AUS→ORD |
|---|---|---|---|
| Distance from IAH | – | 24 mi | 140 mi |
| Nonstop airlines | 6 | 3 | 18 |
| Weekly flights | 436 | 1 | 318 |
| Flight time | 2h 13m | 2h 23m | 2h 45m |
| Departure OTP | 64% | – | – |
Airports within 200 miles of IAH with service to Chicago O'Hare International Airport.
Know before you go
Travel Essentials
Practical planning for this route.
Time Difference
0h
Chicago is 0 hours
the same as
Houston.
IAH: CDT · ORD: CDT
When it's 6:00 PM in Houston, it's 6:00 PM in Chicago.
IAH: CDT · ORD: CDT
When it's 6:00 PM in Houston, it's 6:00 PM in Chicago.
Distance & Flight Time
926 mi / 1,491 km
Nonstop flight time is approximately 2h 13m to 3h 24m.
Getting to IAH
IAH has no direct rail link to downtown Houston. The IAH Express bus runs from Houston Amtrak/Greyhound station via Park & Ride to Terminal C (60–90 min, $1.25 with METRO Q card). This is the only transit option; Houston's rail network does not reach the airport.Taxis from downtown Houston cost $50–70 and take 40–60 minutes. Ride-hails (Uber, Lyft) are typically $35–55. IAH sits 23 miles north of downtown on the North Freeway (I-45); traffic is heavy during morning and evening rush. Remote economy parking lots serve all terminals via shuttle.
Getting from ORD
CTA Blue Line runs 24/7 from O'Hare to downtown Chicago (45 min, $5). Taxis use a flat-rate zone system; downtown is around $40–45 plus tip. Ride-shares are typically $30–50.The Airport Transit System (ATS) connects all terminals and parking. Metra commuter rail does not serve O'Hare directly; transfer downtown via Blue Line.
Chicago Climate
Continental climate with four distinct seasons. Summers are warm and humid (25–32°C) with afternoon thunderstorms. Winters are cold (−10 to −2°C) with heavy snowfall that regularly delays flights December through March.
Spring and fall are mild but unpredictable. Pack layers. Lake Michigan moderates temperatures near the lakefront, but O'Hare sits inland and runs colder.
Facts
IAH–ORD Quick Facts
Key statistics for the Houston to Chicago route.
Route details
Distance926 mi / 1,491 km
Flight time2h 13m to 3h 24m
Time difference0 hours
Airlines (nonstop)6
Weekly flights436 out / 459 return
1-stop connections196 hubs
Origin: IAH
Full nameGeorge Bush Intercontinental Airport
IATA / ICAOIAH / KIAH
TimezoneAmerica/Chicago
Passengers/yr46.7M
Elevation97 ft / 30 m
Destination: ORD
Full nameChicago O'Hare International Airport
IATA / ICAOORD / KORD
TimezoneAmerica/Chicago
Passengers/yr80.0M
Elevation680 ft / 207 m
FAQ
Frequently Asked Questions
Common questions about IAH to ORD flights.
Nonstop flights from George Bush Intercontinental Airport to Chicago O'Hare International Airport take approximately 2h 13m to 3h 24m. The route covers 926 miles.
6 airlines operate nonstop service: American Airlines, Aeromexico, Delta Air Lines, Frontier, Spirit Airlines and United Airlines. Plus 16 codeshare partners.
There are approximately 436 nonstop flights per week from IAH to ORD. The return direction has about 459 weekly flights.
Yes, 1-stop connections are available through FTW, UIN, SUS, PIA, DAL, TUP, LUK, MDW, IAB, BMG, DAY, MKC, RFD, GPT, AVL, CXO, CKB, SHV, CAK, LCQ, APA, ISM, JAN, MAF, INT, RIL, HHH, GJT, MGM, APF, TEB, PIE, MLB, ROW, FRG, SCF, HDN, HPN, GUC, BED, YQB, EGE, ALB, VNY, CZM, BZE, ZIH, PVR, BFI, SJD, SBA, FAT, MRY, PLS, PAH, LNK, MLM, YYT, LIR, CUN, BJX, ONT, BGI, MTY, KEF, DEN, QRO, DSM, SLN, ORF, BRU, CVG, MKE, GRR, DFW, IND, MEM, MCI, ATL, MEX, HHN, TUL, STL, TVC, MSP, MSY, CHA, MTJ, LUX, RSW, SAT, DTW, PIT, CLE, BNA, TYS, GCM, AUS, BWI, CMN, DCA, OKC, GSP, HSV, SDF, ELP, IAD, RIC, FLL, SGF, ICT, TUS, XNA, BDL, CMH, HNL, BHM, CHS, OMA, LIT, YYZ, COS, SAV, RDU, SBN, JAX, CLT, PHL, EWR, ABQ, LAX, SMF, MIA, MCO, SJU, ECP, PDX, PNS, LAS, TPA, CPH, PHX, SFO, LGA, BTV, BOS, MXP, YVR, SEA, SLC, YYC, JAC, PBI, BEG, ANC, BZN, SRQ, YUL, CDG, AMS, LHR, SAN, PTY, GDL, SJO, JFK, SNA, RAP, MUC, FRA, GYD, ASE, SJC, PSP, LGG, PUJ, RNO, YEG, GEG, NAS, GUA, EYW, GIG, NRT, MBJ, BOG, AUA, NLU, STT, GRU, IST, FCO, TPE, DOH, HND and DXB. These options provide additional schedule flexibility.
Yes, return flights from ORD to IAH are available. Use the direction toggle at the top to view the return schedule.
Click the 'Search Flights' button to check availability and prices on Google Flights. You can also compare airlines and schedules on this page to find the best option.
See the On-Time Performance section for the latest delay data at both airports. This shows departure and arrival reliability to help you plan.
Route data is updated regularly from official airline schedules. On-time performance data comes from recent airport delay snapshots.
United Airlines operates IAH as its primary hub and departs for O'Hare from Terminals A, B, C, or E depending on the day's aircraft assignment. All United gates at IAH are connected airside via an underground train, so terminal assignments at IAH are less critical than at airports without cross-terminal connections. At O'Hare, IAH flights arrive at United's Terminal 1.
Houston is prone to severe weather in spring and early summer, with mesoscale convective systems capable of generating multi-hour ground stops at IAH. Tropical systems from June through November can close or severely restrict the airport for 12–24 hours. The en-route track north also crosses active convective zones over the southern Plains in spring, occasionally requiring rerouting that adds 20–30 minutes to block times.
United's Polaris business class with lie-flat seats appears on some IAH–ORD rotations, particularly early morning and late evening business banks on widebody equipment. The 2.5-hour block time is short enough that many rotations use narrowbody 737s with standard recliner first class. Check the aircraft type at booking. The equipment type is displayed on United's search results before purchase.
Houston Intercontinental to Chicago O'Hare: United Hub-to-Hub Spine
IAH–ORD connects United Airlines' two largest hubs, making it one of the carrier's most operationally significant domestic segments. United holds a commanding share of capacity given its hub dominance at both ends, with American and Southwest providing limited competition. The 2.5-hour block time supports robust morning-departure, afternoon-return business banking, and the route carries substantial connecting traffic using IAH as a Gulf Coast gateway and ORD as a Midwest distribution point. Energy sector business travel between Houston and Chicago's financial district drives consistent demand.
Ground Access and Hub Connectivity
Houston IAH is 35 km north of downtown Houston and reached primarily by taxi, rideshare, or the Airport Direct bus to Midtown. No rail link exists to central Houston. O'Hare connects to downtown Chicago via the CTA Blue Line in 45 minutes for the Loop or via the Metra Union Pacific Northwest line. Both airports' United hubs offer extensive onward connections. IAH feeds Latin America and the Caribbean, while ORD feeds the broader Midwest, East Coast, and transatlantic network.