Here are all the public use airports between 50 and 150 NM from KHPN:

FOK FRANCIS S GABRESKI (50.7 nm) SMQ SOMERSET (51.18 nm) 47N CENTRAL JERSEY RGNL (52.02 nm) 3N6 OLD BRIDGE (52.95 nm) 4B8 ROBERTSON FIELD (53.31 nm) 21N MATTITUCK (54.18 nm) N05 HACKETTSTOWN (54.24 nm) N51 SOLBERG-HUNTERDON (55.13 nm) 46N SKY PARK (55.34 nm) BLM MONMOUTH EXECUTIVE (56.11 nm) 20N KINGSTON-ULSTER (56.27 nm) SNC CHESTER (57.63 nm) 87N SOUTHAMPTON (58.04 nm) 1N7 BLAIRSTOWN (58.86 nm) 39N PRINCETON (59.05 nm) 42B GOODSPEED (61.03 nm) MSV SULLIVAN COUNTY INTL (62.14 nm) HFD HARTFORD-BRAINARD (62.42 nm) N12 LAKEWOOD (63.7 nm) 1A1 GREEN ACRES (64.95 nm) 9B8 SALMON RIVER AIRFIELD (65.22 nm) N40 SKY MANOR (65.26 nm) N87 TRENTON-ROBBINSVILLE (65.45 nm) 4B9 SIMSBURY (65.99 nm) N53 STROUDSBURG-POCONO (65.99 nm) N85 ALEXANDRIA (66.31 nm) HTO EAST HAMPTON (66.44 nm) GBR WALTER J KOLADZA (68.39 nm) TTN TRENTON MERCER (69.24 nm) BDL BRADLEY INTL (69.77 nm) 8N4 FLYING DOLLAR (70.34 nm) 48P ROCKY HILL (71.27 nm) 9N1 VANSANT (72.44 nm) N43 BRADEN AIRPARK (72.52 nm) 7B6 SKYLARK AIRPARK (72.59 nm) 1B1 COLUMBIA COUNTY (73.43 nm) MJX OCEAN COUNTY (73.51 nm) N30 CHERRY RIDGE (74.84 nm) MPO POCONO MOUNTAINS MUNI (75.98 nm) 7B9 ELLINGTON (76.35 nm) 0B8 ELIZABETH FIELD (76.75 nm) 2N6 REDWING (76.88 nm) GON GROTON-NEW LONDON (76.93 nm) NY1 KLINE KILL (77.02 nm) DYL DOYLESTOWN (78.13 nm) N00 MABEN (78.6 nm) 70N SPRING HILL (79.17 nm) BAF WESTFIELD-BARNES RGNL (79.2 nm) 1I5 FREEHOLD (79.43 nm) IJD WINDHAM (80.02 nm) MTP MONTAUK (81.1 nm) 00A TOTAL RF (81.91 nm) 1H4 GREENVILLE-RAINBOW (82.13 nm) ABE LEHIGH VALLEY INTL (82.71 nm) CKZ PENNRIDGE (82.85 nm) PSF PITTSFIELD MUNI (83.72 nm) PNE NORTHEAST PHILADELPHIA (83.89 nm) N73 RED LION (84.48 nm) N14 FLYING W (84.53 nm) N48 HORSHAM VALLEY AIRWAYS INC (84.87 nm) VAY SOUTH JERSEY RGNL (85.18 nm) UKT QUAKERTOWN (85.23 nm) CEF WESTOVER ARB/METROPOLITAN (85.75 nm) XLL ALLENTOWN QUEEN CITY MUNI (86.41 nm) WST WESTERLY STATE (87.88 nm) 69N SLATINGTON (88.2 nm) 31E EAGLES NEST (88.43 nm) 14N BELTZVILLE (88.65 nm) 4B0 SOUTH ALBANY (89.77 nm) 7B2 NORTHAMPTON (90.26 nm) LOM WINGS FIELD (90.4 nm) C44 TOUTANT (91.62 nm) AVP WILKES-BARRE/SCRANTON INTL (92.74 nm) P91 FLYING M AERODROME (93.01 nm) LZD DANIELSON (93.18 nm) 7N8 BUTTER VALLEY GOLF PORT (93.7 nm) N10 PERKIOMEN VALLEY (94.17 nm) P72 PENN'S LANDING (94.3 nm) 22N JAKE ARNER MEMORIAL (94.66 nm) 19N CAMDEN COUNTY (95.91 nm) N81 HAMMONTON MUNI (96.75 nm) BID BLOCK ISLAND STATE (96.77 nm) 3B0 SOUTHBRIDGE MUNI (97.42 nm) 5B7 RENSSELAER COUNTY (97.61 nm) 08R RICHMOND (97.75 nm) 9N3 SEAMANS FIELD (97.75 nm) PTW HERITAGE FIELD (97.94 nm) WBW WILKES-BARRE WYOMING VALLEY (98.14 nm) N25 BLUE HERON (100.23 nm) PHL PHILADELPHIA INTL (100.3 nm) AQW HARRIMAN-AND-WEST (100.64 nm) ALB ALBANY INTL (100.97 nm) 17N CROSS KEYS (101.76 nm) N47 POTTSTOWN MUNI (101.85 nm) 9N2 PHILADELPHIA (102.77 nm) 4B1 DUANESBURG (103.32 nm) C01 SOUTHERN CROSS (103.7 nm) HZL HAZLETON RGNL (103.98 nm) ACY ATLANTIC CITY INTL (104.43 nm) 8B5 TANNER-HILLER (104.9 nm) 76N SKYHAVEN (104.93 nm) 0B5 TURNERS FALLS (105.75 nm) N66 ONEONTA MUNI (106.54 nm) N23 SIDNEY MUNI (106.72 nm) OQN BRANDYWINE (107.34 nm) 60M SPENCER (107.35 nm) SCH SCHENECTADY COUNTY (107.55 nm) P32 HUSKY HAVEN (107.59 nm) K23 COOPERSTOWN-WESTVILLE (107.68 nm) 28N VINELAND-DOWNSTOWN (108.31 nm) OQU QUONSET STATE (108.51 nm) ORH WORCESTER RGNL (109.39 nm) K27 BURRELLO-MECHANICVILLE (109.54 nm) K31 SHARON (109.79 nm) PVD THEODORE FRANCIS GREEN STATE (110.21 nm) ORE ORANGE MUNI (110.35 nm) RDG READING RGNL/CARL A SPAATZ FIELD (110.95 nm) 29N KROELINGER (111.06 nm) 7N7 SPITFIRE AERODROME (111.24 nm) DDH WILLIAM H MORSE STATE (111.34 nm) W57 ROUND LAKE (111.73 nm) SFZ NORTH CENTRAL STATE (112.27 nm) O03 MORGANTOWN (112.89 nm) UUU NEWPORT STATE (113.2 nm) RI9 DOWNTOWN PROVIDENCE HELISTOP (113.3 nm) 26N OCEAN CITY MUNI (115.78 nm) GDM GARDNER MUNI (116.91 nm) 1B6 HOPEDALE INDUSTRIAL PARK (116.94 nm) 00N BUCKS (117.19 nm) 4V8 DEERFIELD VALLEY RGNL (117.75 nm) MQS CHESTER COUNTY G O CARLSON (118.33 nm) 3B3 STERLING (118.47 nm) NY0 FULTON COUNTY (119.12 nm) 5B2 SARATOGA COUNTY (119.18 nm) 4N7 GREENE (119.35 nm) MIV MILLVILLE MUNI (119.63 nm) N57 NEW GARDEN (120.07 nm) 1B8 CHAPIN FLD (120.09 nm) ILG NEW CASTLE (120.46 nm) B04 GARNSEYS (120.57 nm) OIC LT WARREN EATON (121.36 nm) OBI WOODBINE MUNI (121.55 nm) 8N1 GRIMES (121.62 nm) BGM GREATER BINGHAMTON/EDWIN A LINK FIELD (123.02 nm) ZER SCHUYLKILL COUNTY /JOE ZERBEY/ (123.21 nm) CZG TRI-CITIES (123.5 nm) N13 BLOOMSBURG MUNI (123.92 nm) FIT FITCHBURG MUNI (124.89 nm) 9B1 MARLBORO (124.98 nm) 1B9 MANSFIELD MUNI (126.18 nm) K30 HEBER AIRPARK (126.98 nm) 9D4 DECK (127.08 nm) EEN DILLANT-HOPKINS (127.27 nm) 08N KELLER BROTHERS (128.36 nm) 6B6 MINUTE MAN AIR FIELD (129.04 nm) AFN JAFFREY AIRPORT-SILVER RANCH (129.2 nm) EWB NEW BEDFORD RGNL (129.48 nm) 1M8 MYRICKS (129.51 nm) S37 SMOKETOWN (129.58 nm) N79 NORTHUMBERLAND COUNTY (130.06 nm) N27 BRADFORD COUNTY (130.11 nm) 9N7 FARMERS PRIDE (130.15 nm) TAN TAUNTON MUNI - KING FIELD (130.68 nm) 1F2 PLATEAU SKY RANCH (130.74 nm) EVY SUMMIT (130.98 nm) LNS LANCASTER (131.09 nm) 1F6 DOLGEVILLE (131.45 nm) 1C3 ARGYLE (131.63 nm) OWD NORWOOD MEMORIAL (132.45 nm) 74N BENDIGO (133.45 nm) 8N8 DANVILLE (133.57 nm) 58M CLAREMONT (133.62 nm) 6B4 FRANKFORT-HIGHLAND (133.93 nm) VGC HAMILTON MUNI (135.04 nm) WWD CAPE MAY COUNTY (135.25 nm) 38N SMYRNA (136.45 nm) GFL FLOYD BENNETT MEMORIAL (136.47 nm) BED LAURENCE G HANSCOM FLD (137.36 nm) H11 SUNBURY (137.77 nm) 0N4 CHANDELLE ESTATES (138.53 nm) 58N REIGLE FIELD (139.08 nm) 71N SUNBURY (139.96 nm) 83K HARRIS (140.64 nm) 33N DELAWARE AIRPARK (140.85 nm) MA6 MONPONSETT POND (140.9 nm) MVY MARTHA'S VINEYARD (141.41 nm) 28M CRANLAND (141.46 nm) 0N5 DELDOT HELISTOP (141.63 nm) M06 HAVRE DE GRACE (141.84 nm) ASH BOIRE FIELD (142.24 nm) MD1 MASSEY AERODROME (143.11 nm) PYM PLYMOUTH MUNI (143.49 nm) N71 DONEGAL SPRINGS AIRPARK (143.49 nm) BOS GENERAL EDWARD LAWRENCE LOGAN INTL (144.12 nm) 8B1 HAWTHORNE-FEATHER AIRPARK (144.19 nm) SEG PENN VALLEY (144.27 nm) N03 CORTLAND COUNTY-CHASE FIELD (144.97 nm) 1B2 KATAMA AIRPARK (145.19 nm) 15N JENKINS (145.36 nm) 0W3 HARFORD COUNTY (145.59 nm) IPT WILLIAMSPORT RGNL (146.05 nm) 5B6 FALMOUTH AIRPARK (146.5 nm) VSF HARTNESS STATE (SPRINGFIELD) (146.5 nm) 9W8 BAUBLITZ COMMERCIAL (146.62 nm) K09 PISECO (147.58 nm) MDT HARRISBURG INTL (149.06 nm) 0N6 HENDERSON AVIATION (149.15 nm) GHG MARSHFIELD MUNI - GEORGE HARLOW FIELD (149.95 nm)