United Flight 398 Deals & Information (2025/2026)

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United Flight 398 Route Deals From $65

The cheapest prices found with in the last 7 days for return flights were $127 and $65 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Sep 16 - Sat, Sep 20
CLE
Hopkins Intl.
ORD
O'Hare Intl.
$127 Roundtrip, found 1 day ago
$127
Roundtrip
found 1 day ago
Select United flight, departing Tue, Sep 16 from Hopkins Intl. to O'Hare Intl., returning Sat, Sep 20, priced at $127 found 1 day ago
Wed, Nov 5 - Mon, Nov 10
CLE
Hopkins Intl.
ORD
O'Hare Intl.
$132 Roundtrip, found 18 hours ago
$132
Roundtrip
found 18 hours ago
Select United flight, departing Wed, Nov 5 from Hopkins Intl. to O'Hare Intl., returning Mon, Nov 10, priced at $132 found 18 hours ago
Sun, Sep 7 - Thu, Sep 11
CLE
Hopkins Intl.
ORD
O'Hare Intl.
$144 Roundtrip, found 1 day ago
$144
Roundtrip
found 1 day ago
Select United flight, departing Sun, Sep 7 from Hopkins Intl. to O'Hare Intl., returning Thu, Sep 11, priced at $144 found 1 day ago
Tue, Sep 16 - Sat, Sep 20
CLE
Hopkins Intl.
ORD
O'Hare Intl.
$151 Roundtrip, found 1 day ago
$151
Roundtrip
found 1 day ago
Select United flight, departing Tue, Sep 16 from Hopkins Intl. to O'Hare Intl., returning Sat, Sep 20, priced at $151 found 1 day ago
Wed, Nov 5 - Mon, Nov 10
CLE
Hopkins Intl.
ORD
O'Hare Intl.
$156 Roundtrip, found 18 hours ago
$156
Roundtrip
found 18 hours ago
Select United flight, departing Wed, Nov 5 from Hopkins Intl. to O'Hare Intl., returning Mon, Nov 10, priced at $156 found 18 hours ago
Mon, Oct 13 - Wed, Oct 15
CLE
Hopkins Intl.
ORD
O'Hare Intl.
$158 Roundtrip, found 1 day ago
$158
Roundtrip
found 1 day ago
Select United flight, departing Mon, Oct 13 from Hopkins Intl. to O'Hare Intl., returning Wed, Oct 15, priced at $158 found 1 day ago
Wed, Nov 5 - Mon, Nov 10
CLE
Hopkins Intl.
ORD
O'Hare Intl.
$158 Roundtrip, found 18 hours ago
$158
Roundtrip
found 18 hours ago
Select United flight, departing Wed, Nov 5 from Hopkins Intl. to O'Hare Intl., returning Mon, Nov 10, priced at $158 found 18 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.