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United Airlines United Airlines

UA3990 Flight Status

According to Trip.com real-time data, the UA3990 flight operated by United Airlines on Sep 21, 2026 is scheduled to fly from Houston (IAH) to Louisville (SDF). The flight is expected to depart at 09:45 (local time in Houston, UTC-5) and land at 12:32 (local time in Louisville, UTC-4) .
Sun, Sep 20
Mon, Sep 21
HOU-SDF

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Arrived
The flight has arrived 15m early
Houston(IAH)
10:04
Scheduled: 09:45, Sep 20
George Bush Intercontinental Airport C
173106C5-5199-4134-A176-6296CB3DA377 2h 22m
Louisville(SDF)
12:52
Scheduled: 13:07, Sep 20
Louisville International Airport
Check-in Counter
--
Boarding Gate
B43
Arrival Gate
A15
Baggage
1
HOU-SDF

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Scheduled
Your flight will depart on time.
Houston(IAH)
09:45
Scheduled: 09:45, Sep 21
George Bush Intercontinental Airport C
173106C5-5199-4134-A176-6296CB3DA377 2h 22m
Louisville(SDF)
12:32
Scheduled: 13:07, Sep 21
Louisville International Airport
Check-in Counter
--
Boarding Gate
B43
Arrival Gate
A14
Baggage
A
Information provided by VariFlight For real-time updates, please check airport displays or contact your airline.
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UA3990

Track the Previous Flight Status: Scheduled

UA4031
|
Des Moines (DSM) Houston (HOU)
Scheduled: 08:50
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UA3990 Aircraft Details

According to Trip.com real-time data, the UA3990 flight flying from Houston to Louisville on 9/21/2026 is operated by the aircraft model Embraer 175. This aircraft has been in service for 12y, 5m. The aircraft is equipped with 76 seats.
flight status
Embraer 175
Punctuality (Departure)
93%
Punctuality (Arrival)
100%
Early on average
14 minutes
Age
12y, 5m
Seats
76
Flight Distance
--
Economy
First
Premium Economy
In-Flight Services
None
Inflight entertainment is available
Unknown
Unknown
Seat Information
79 cm
Legroom
46 cm
Seat width
100°
Reclining Angle
2-2
Seat layout example
In-Flight Services
Snacks
Inflight entertainment is available
Unknown
Power outlet
Seat Information
94 cm
Legroom
51 cm
Seat width
120°
Reclining Angle
1-2
Seat layout example
In-Flight Services
Snacks
In-flight entertainment is unavailable
Wi-Fi is available
No power outlets are available
Seat Information
86 cm
Legroom
46 cm
Seat width
105°
Reclining Angle
--
Seat layout example
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Flight History for UA3990

Trip.com historical records show that the last UA3990 flight departed on Sun, Sep 20 from IAH at approximately 10:04. This flight is expected to arrrive in SDF at 12:52.
DateAirportAircraft ModelDepartureArrivalStatus
DepartureArrival
Tue, Sep 15Houston (IAH)Louisville (SDF)E75L09:5312:37Arrived
Wed, Sep 16Houston (IAH)Louisville (SDF)E75L09:5212:39Arrived
Thu, Sep 17Houston (IAH)Louisville (SDF)E75L10:0212:50Arrived
Fri, Sep 18Houston (IAH)Louisville (SDF)E75L10:0812:58Arrived
Sat, Sep 19Houston (IAH)Louisville (SDF)E75L09:5612:43Arrived
Sun, Sep 20Houston (IAH)Louisville (SDF)E75L10:0412:52Arrived
Mon, Sep 21Houston (IAH)Louisville (SDF)E75L09:4512:32Scheduled
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UA3990 On-Time Performance

Based on the average performance of this flight over the past 30 trips, the on-time departure rate of UA3990 is 93% (Late on average 15 minutes), and the on-time arrival rate is 100% (Early on average 14 minutes).

On-Time Departures
Punctuality
93%
Late on average 15 minutes
Early
0%
On time
93%
30 mins late
7%
60 mins late
0%
90 mins late
0%
Canceled
0%
On-Time Arrivals
Punctuality
100%
Early on average 14 minutes
Early
90%
On time
10%
30 mins late
0%
60 mins late
0%
90 mins late
0%
Canceled
0%

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Frequently Asked Questions

  • What is the current status of flight ua3990?

    Flight ua3990 has not departed yet and is currently on schedule. Scheduled departure 09:45, arrival 13:07 (updated Sep 21, 2026).
  • Flight ua3990 has not departed yet and is currently on schedule. Scheduled departure is 09:45, with arrival at 13:07. Recheck gate and timing before you head to the airport.
  • Flight ua3990 is scheduled to depart at 09:45. The latest actual or estimated departure time is 09:45, and the current status is Scheduled (updated Sep 21, 2026).
  • Flight ua3990 is scheduled to arrive at 13:07. The latest estimated or actual arrival time is 12:32. Status is Scheduled as of Sep 21, 2026.
  • For flight ua3990, the departure terminal is C and the boarding gate is B43. Gate assignments can change at short notice—confirm on airport screens before heading to security.
  • Flight ua3990 is operated by United Airlines from Houston (IAH) to Louisville (SDF). Typical flight time is about 2 hours22 minutes; operating days may include Monday.
  • Track flight ua3990 on this Trip.com status page for live departure, arrival, gate and baggage updates. For push alerts on the go, open the same flight in the Trip.com App and turn on flight notifications.
  • If ua3990 is delayed or canceled, first confirm the latest status here (Scheduled, updated Sep 21, 2026). Contact United Airlines or your booking channel for rebooking or refund options, and check Trip.com Manage Booking if you booked on Trip.com.
  • Flight ua3990 has not departed from Houston (IAH) yet and is currently on schedule for 09:45.
  • Flight ua3990 usually flies a Embraer 175 with seat layout 2-2. Layouts can differ by aircraft subtype and cabin product—confirm your seat map in Manage Booking after you purchase.

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Arrival Info: Louisville Weather & Current Time

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Mostly cloudy
|
21°C - 35°C
Weather forecast for your arrival day
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1 hour time difference
Time on arrival: Houston 11:32| Louisville 12:32

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