United Flight 21 Deals & Information (2026/2027)

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United Flight 21 Route Deals From $1,757

The cheapest prices found with in the last 7 days for return flights were $876 and $1,757 for one-way flights to George Bush Intercontinental for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Sep 23 - Wed, Oct 7
AMS
Schiphol
IAH
George Bush Intercontinental
$876 Roundtrip, found 3 days ago
$876
Roundtrip
found 3 days ago
Select United flight, departing Wed, Sep 23 from Schiphol to George Bush Intercontinental, returning Wed, Oct 7, priced at $876 found 3 days ago
Wed, Sep 23 - Wed, Oct 7
AMS
Schiphol
IAH
George Bush Intercontinental
$887 Roundtrip, found 3 days ago
$887
Roundtrip
found 3 days ago
Select United flight, departing Wed, Sep 23 from Schiphol to George Bush Intercontinental, returning Wed, Oct 7, priced at $887 found 3 days ago
Sun, Nov 1 - Sat, Nov 14
AMS
Schiphol
IAH
George Bush Intercontinental
$888 Roundtrip, found 5 days ago
$888
Roundtrip
found 5 days ago
Select United flight, departing Sun, Nov 1 from Schiphol to George Bush Intercontinental, returning Sat, Nov 14, priced at $888 found 5 days ago