United Flight UA5139 Deals & Information (2025/2026)

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United Flight 5139 Route Deals From $229

The cheapest prices found with in the last 7 days for return flights were $285 and $229 for one-way flights to Yellowstone for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Aug 9 - Fri, Aug 15
DEN
Denver Intl.
WYS
Yellowstone
$285 Roundtrip, found 4 days ago
$285
Roundtrip
found 4 days ago
Select United flight, departing Sat, Aug 9 from Denver Intl. to Yellowstone, returning Fri, Aug 15, priced at $285 found 4 days ago
Sat, Aug 9 - Fri, Aug 15
DEN
Denver Intl.
WYS
Yellowstone
$295 Roundtrip, found 4 days ago
$295
Roundtrip
found 4 days ago
Select United flight, departing Sat, Aug 9 from Denver Intl. to Yellowstone, returning Fri, Aug 15, priced at $295 found 4 days ago
Sat, Aug 9 - Fri, Aug 15
DEN
Denver Intl.
WYS
Yellowstone
$417 Roundtrip, found 4 days ago
$417
Roundtrip
found 4 days ago
Select United flight, departing Sat, Aug 9 from Denver Intl. to Yellowstone, returning Fri, Aug 15, priced at $417 found 4 days ago
Sat, Aug 9 - Fri, Aug 15
DEN
Denver Intl.
WYS
Yellowstone
$440 Roundtrip, found 4 days ago
$440
Roundtrip
found 4 days ago
Select United flight, departing Sat, Aug 9 from Denver Intl. to Yellowstone, returning Fri, Aug 15, priced at $440 found 4 days ago

Frequently asked questions

What route does flight number UA5139 take?
UA5139 takes multiple routes. The most frequently flown is between O'Hare Intl. Airport (ORD) and Mason City, IA Airport (MCW-Mason City Municipal), which is a direct flight. This flight takes around 1 hour and 30 minutes. However, you might find other flights with the same number that are multi-stop.
What terminal does UA5139 fly out of?
Terminal 2 is where you'll most likely jet off from if you're booked on a flight from ORD. ORD to Mason City Municipal Airport is the most popular route for flight number UA5139.
What kind of plane is on flight number UA5139?
If you're taking flight UA5139 from O'Hare Airport to Mason City Municipal Airport, you're likely to be cruising aboard the Bombardier CRJ. This flight number serves multiple routes, but this is the most popular one.
If I am not able to travel due to COVID-19, can I change my flight to a later date?
For more info about changing your UA5139 flight with Travelocity, please visit our Customer Service Portal.