United Flight 398 Deals & Information (2025/2026)

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United Flight 398 Route Deals From $71

The cheapest prices found with in the last 7 days for return flights were $106 and $71 for one-way flights to LaGuardia for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Nov 13 - Fri, Nov 21
ORD
O'Hare Intl.
LGA
LaGuardia
$106 Roundtrip, just found
$106
Roundtrip
just found
Select United flight, departing Thu, Nov 13 from O'Hare Intl. to LaGuardia, returning Fri, Nov 21, priced at $106 just found
Thu, Dec 11 - Sat, Dec 13
ORD
O'Hare Intl.
LGA
LaGuardia
$115 Roundtrip, just found
$115
Roundtrip
just found
Select United flight, departing Thu, Dec 11 from O'Hare Intl. to LaGuardia, returning Sat, Dec 13, priced at $115 just found
Thu, Nov 13 - Fri, Nov 21
ORD
O'Hare Intl.
LGA
LaGuardia
$118 Roundtrip, just found
$118
Roundtrip
just found
Select United flight, departing Thu, Nov 13 from O'Hare Intl. to LaGuardia, returning Fri, Nov 21, priced at $118 just found
Thu, Nov 13 - Fri, Nov 21
ORD
O'Hare Intl.
LGA
LaGuardia
$120 Roundtrip, just found
$120
Roundtrip
just found
Select United flight, departing Thu, Nov 13 from O'Hare Intl. to LaGuardia, returning Fri, Nov 21, priced at $120 just found
Wed, Dec 10 - Sat, Dec 13
ORD
O'Hare Intl.
LGA
LaGuardia
$137 Roundtrip, found 2 hours ago
$137
Roundtrip
found 2 hours ago
Select United flight, departing Wed, Dec 10 from O'Hare Intl. to LaGuardia, returning Sat, Dec 13, priced at $137 found 2 hours ago

Frequently asked questions

What route does flight number UA398 take?
UA398 flies directly from IAD to Miami Intl. Airport (MIA) in 2 hours and 45 minutes. It can sometimes be used on other routes though, some of which may be multi-stop flights. Keep an eye out for this when booking your airfare to avoid any confusion.
What kind of plane is on flight number UA398?
If you have a seat on flight UA398 from Washington Dulles Intl. Airport (IAD) to Miami, FL Airport (MIA-Miami Intl.), there's a good chance you'll be on board the Boeing 737-800. Flight UA398 serves multiple routes, but this is the most common 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 UA398 flight with Travelocity, please visit our Customer Service Portal.