United Flight UA5139 Deals & Information (2025/2026)

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United Flight 5139 Route Deals From $306

The cheapest prices found with in the last 7 days for return flights were $248 and $306 for one-way flights to Yellowstone for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Aug 29 - Tue, Sep 2
DEN
Denver Intl.
WYS
Yellowstone
$248 Roundtrip, found 8 hours ago
$248
Roundtrip
found 8 hours ago
Select United flight, departing Fri, Aug 29 from Denver Intl. to Yellowstone, returning Tue, Sep 2, priced at $248 found 8 hours ago
Fri, Aug 29 - Tue, Sep 2
DEN
Denver Intl.
WYS
Yellowstone
$268 Roundtrip, found 8 hours ago
$268
Roundtrip
found 8 hours ago
Select United flight, departing Fri, Aug 29 from Denver Intl. to Yellowstone, returning Tue, Sep 2, priced at $268 found 8 hours ago
Fri, Aug 29 - Tue, Sep 2
DEN
Denver Intl.
WYS
Yellowstone
$352 Roundtrip, found 8 hours ago
$352
Roundtrip
found 8 hours ago
Select United flight, departing Fri, Aug 29 from Denver Intl. to Yellowstone, returning Tue, Sep 2, priced at $352 found 8 hours ago
Fri, Aug 29 - Mon, Sep 1
DEN
Denver Intl.
WYS
Yellowstone
$597 Roundtrip, found 8 hours ago
$597
Roundtrip
found 8 hours ago
Select United flight, departing Fri, Aug 29 from Denver Intl. to Yellowstone, returning Mon, Sep 1, priced at $597 found 8 hours 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.