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 9:45 AM (local time in Houston, UTC-5) and land at 12:32 PM (local time in Louisville, UTC-4) .
Sun, Sep 20
Mon, Sep 21
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Arrived
The flight has arrived 15m early
2h 22m
Check-in Counter
--
Boarding Gate
B43
Arrival Gate
A15
Baggage
1
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Scheduled
Your flight will depart on time.
2h 22m
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. You can also explore more flights from Houston to Louisville or track other flights with our flight status tracker.
Track the Previous Flight Status: Scheduled
UA4031
|
Des Moines (DSM) 
Houston (HOU)
Houston (HOU)Scheduled: 8:50 AM
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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.
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 AM. This flight is expected to arrrive in SDF at 12:52 PM.
| Date | Airport | Aircraft Model | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Departure | Arrival | |||||
| Tue, Sep 15 | Houston (IAH) | Louisville (SDF) | E75L | 9:53 AM | 12:37 PM | Arrived |
| Wed, Sep 16 | Houston (IAH) | Louisville (SDF) | E75L | 9:52 AM | 12:39 PM | Arrived |
| Thu, Sep 17 | Houston (IAH) | Louisville (SDF) | E75L | 10:02 AM | 12:50 PM | Arrived |
| Fri, Sep 18 | Houston (IAH) | Louisville (SDF) | E75L | 10:08 AM | 12:58 PM | Arrived |
| Sat, Sep 19 | Houston (IAH) | Louisville (SDF) | E75L | 9:56 AM | 12:43 PM | Arrived |
| Sun, Sep 20 | Houston (IAH) | Louisville (SDF) | E75L | 10:04 AM | 12:52 PM | Arrived |
| Mon, Sep 21 | Houston (IAH) | Louisville (SDF) | E75L | 9:45 AM | 12:32 PM | Scheduled |
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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 9:45 AM, arrival 1:07 PM (updated Sep 21, 2026).Is flight ua3990 on time today?
Flight ua3990 has not departed yet and is currently on schedule. Scheduled departure is 9:45 AM, with arrival at 1:07 PM. Recheck gate and timing before you head to the airport.Has flight ua3990 departed yet? What is the departure time?
Flight ua3990 is scheduled to depart at 9:45 AM. The latest actual or estimated departure time is 9:45 AM, and the current status is Scheduled (updated Sep 21, 2026).When is flight ua3990 scheduled to arrive?
Flight ua3990 is scheduled to arrive at 1:07 PM. The latest estimated or actual arrival time is 12:32 PM. Status is Scheduled as of Sep 21, 2026.What is the gate information for flight ua3990?
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.What route does flight ua3990 fly?
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.How can I check real-time status for flight ua3990?
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 flight ua3990 is delayed or canceled, what should I do?
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.Has flight ua3990 departed from Houston?
Flight ua3990 has not departed from Houston (IAH) yet and is currently on schedule for 9:45 AM.What is the seat configuration for flight ua3990?
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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21°C - 35°C
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1 hour time difference
Time on arrival: Houston 11:32| Louisville 12:32
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