United Flight UA4172 Deals & Information (2025/2026)

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United Flight 4172 Route Deals From $65

The cheapest prices found with in the last 7 days for return flights were $129 and $65 for one-way flights to Ronald Reagan Washington National for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Sep 19 - Sun, Sep 21
EWR
Newark Liberty Intl. Airport
DCA
Ronald Reagan Washington National
$129 Roundtrip, found 21 hours ago
$129
Roundtrip
found 21 hours ago
Select United flight, departing Fri, Sep 19 from Newark Liberty Intl. Airport to Ronald Reagan Washington National, returning Sun, Sep 21, priced at $129 found 21 hours ago
Thu, Jul 31 - Fri, Aug 1
EWR
Newark Liberty Intl. Airport
DCA
Ronald Reagan Washington National
$132 Roundtrip, found 12 hours ago
$132
Roundtrip
found 12 hours ago
Select United flight, departing Thu, Jul 31 from Newark Liberty Intl. Airport to Ronald Reagan Washington National, returning Fri, Aug 1, priced at $132 found 12 hours ago
Sun, Aug 3 - Mon, Aug 4
EWR
Newark Liberty Intl. Airport
DCA
Ronald Reagan Washington National
$135 Roundtrip, found 17 hours ago
$135
Roundtrip
found 17 hours ago
Select United flight, departing Sun, Aug 3 from Newark Liberty Intl. Airport to Ronald Reagan Washington National, returning Mon, Aug 4, priced at $135 found 17 hours ago
Sun, Aug 3 - Mon, Aug 4
EWR
Newark Liberty Intl. Airport
DCA
Ronald Reagan Washington National
$136 Roundtrip, found 17 hours ago
$136
Roundtrip
found 17 hours ago
Select United flight, departing Sun, Aug 3 from Newark Liberty Intl. Airport to Ronald Reagan Washington National, returning Mon, Aug 4, priced at $136 found 17 hours ago
Fri, Sep 19 - Sun, Sep 21
EWR
Newark Liberty Intl. Airport
DCA
Ronald Reagan Washington National
$137 Roundtrip, found 21 hours ago
$137
Roundtrip
found 21 hours ago
Select United flight, departing Fri, Sep 19 from Newark Liberty Intl. Airport to Ronald Reagan Washington National, returning Sun, Sep 21, priced at $137 found 21 hours ago
Fri, Sep 19 - Sun, Sep 21
EWR
Newark Liberty Intl. Airport
DCA
Ronald Reagan Washington National
$138 Roundtrip, found 21 hours ago
$138
Roundtrip
found 21 hours ago
Select United flight, departing Fri, Sep 19 from Newark Liberty Intl. Airport to Ronald Reagan Washington National, returning Sun, Sep 21, priced at $138 found 21 hours ago
Thu, Jul 31 - Fri, Aug 1
EWR
Newark Liberty Intl. Airport
DCA
Ronald Reagan Washington National
$141 Roundtrip, found 12 hours ago
$141
Roundtrip
found 12 hours ago
Select United flight, departing Thu, Jul 31 from Newark Liberty Intl. Airport to Ronald Reagan Washington National, returning Fri, Aug 1, priced at $141 found 12 hours ago
Tue, Jul 1 - Tue, Jul 8
EWR
Newark Liberty Intl. Airport
DCA
Ronald Reagan Washington National
$141 Roundtrip, found 5 hours ago
$141
Roundtrip
found 5 hours ago
Select United flight, departing Tue, Jul 1 from Newark Liberty Intl. Airport to Ronald Reagan Washington National, returning Tue, Jul 8, priced at $141 found 5 hours ago
Sun, Aug 3 - Mon, Aug 4
EWR
Newark Liberty Intl. Airport
DCA
Ronald Reagan Washington National
$144 Roundtrip, found 17 hours ago
$144
Roundtrip
found 17 hours ago
Select United flight, departing Sun, Aug 3 from Newark Liberty Intl. Airport to Ronald Reagan Washington National, returning Mon, Aug 4, priced at $144 found 17 hours ago
Fri, Sep 19 - Sun, Sep 21
EWR
Newark Liberty Intl. Airport
DCA
Ronald Reagan Washington National
$146 Roundtrip, found 21 hours ago
$146
Roundtrip
found 21 hours ago
Select United flight, departing Fri, Sep 19 from Newark Liberty Intl. Airport to Ronald Reagan Washington National, returning Sun, Sep 21, priced at $146 found 21 hours ago