I think this is also a case though where this is literally no reason not to wait a while to book. It's not like the flight is going to sell out of H fares.
Code:
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Cxr Basis BC Cbn Price Tp AP Min Max Days Rf T Start T End Expiry
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UA TEA0AABS N Y $76.00 RT S 30 N 22-May-19
UA TEA0AAEX T Y $76.00 RT S 30 N 22-May-19
UA TEA0AADS T Y $86.00 RT S 30 N 22-May-19
UA SEA0AABS N Y $101.00 RT S 30 N 22-May-19
UA SEA0AAEX S Y $101.00 RT S 30 N 22-May-19
UA SEA0AADS S Y $111.00 RT S 30 N 22-May-19
UA HAA7AAEN H Y $322.00 OW 7 N
UA EAA3AAEN E Y $372.00 OW 3 N
UA MAA0AAEN M Y $422.00 OW N
UA BAA0AAEY B Y $528.00 OW Y
UA YAA0AAEY Y Y $878.00 OW Y
UA Y Y Y $2,230.00 OW Y
Also, lol, they don't even bother publishing First fares.