Please refer to AAMC listing for particulars of each flight. Series flights like the 1927 flights to the Southern Islands arranged to what I believe is the right sequence.  My estimated value is based on what I perceived to be a fair value of the cover many of which based  on the average realized price(s) for the past two years. The number of covers flown is also taken into account in my valuation.
NR
1
 1914 APR 15: TOM GUNN DEMONSTRATION FLIGHT
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1
1A
 1919 APR 04: RUTH LAW EXHIBITION FLIGHT Sponsored by the Aero Club of the Philippines. Numbered souvenir cards. Special triangular cachet. Cards postmarked April 5 or later not flown.
500.00
1A
1B
 1919 NOV 25: MANILA to CEBU by Croft & Stevenot, certified official mail. ONE KNOWN
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1Aa
1Ba
 1919 NOV 28: ILOILO to MANILA, certified official mail. TWO KNOWN
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1Ab
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 1919 NOV 28: CEBU to MANILA: There is no point in AAMc listing this as "none known to exist."
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2A
2A
 1920 JAN 17: GLIDDEN DEMO FLIGHT, drop mail, red "AEROGRAM" cachet on leaflet or cover
750.00
2Aa
 SAME, drop mail, black cachet exist on leaflet only
750.00
2B
2B
 1923 APR 13: ILOILO to MANILA, 2nd Inter-Island Pioneer Flight. TWO KNOWN
750.00
PHILIPPINE FLIGHTS BY ITALIAN AVIATOR FRANCESCO PINEDO
3
3
 1925 AUG 20: ZAMBOANGA to MANILA, postmarked as early as Aug 17.
400.00
4
4
 1925 AUG 23: CEBU to MANILA
300.00
4A
4A
 1925 AUG 21: PALOMPON, LEYTE to MANILA, most likely by surface to CEBU then by air to MANILA
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4B
4B
 1925 AUG 26: JOLO to MANILA, 1 cover known but questionable as out of route. Possibly by surface mail from JOLO  to CEBU and then flown to Manila.
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5
5
 1925 AUG 27: ATIMONAN, QUEZON to MANILA
600.00
6
6
 1925 SEP 12: CORREGIDOR to MANILA, 34 FLOWN
400.00
7
7
 1925 SEP 16: MANILA to APARRI, one cover known signed by Pinedo
300.00
7a
7a
 1925 SEP 16: MANILA to ABULUG
400.00
7b
7b
 1925 SEP 16: MANILA to LAOAG
400.00
7c
7c
 1925 SEP 16: MANILA to SHANGHAI
500.00
NR
7d
 1925 SEP 16: MANILA to JAPAN
500.00
1925 FIRST INTER-ISLAND AIR SERVICE
8a
8a
 1925 DEC 1: MANILA to SAN JOSE, MINDORO
250.00
8a
8b
 1925 DEC 1: MANILA to NEW WASHINGTON, CAPIZ (NEW WASHINGTON / REC'D / CAPIZ, P.I. / DEC 1 1PM 1925)
250.00
8a
8c
 1925 DEC 1: MANILA to CAPIZ, CAPIZ (CAPIZ / REC'D / CAPIZ, P.I. / DEC 1 1PM 1925)
250.00
8a
8d
 1925 DEC 1: MANILA to CEBU (CEBU, P.I. REC'D / CEBU / DEC 3 12M 1925)
250.00
8a
8e
 1925 DEC 1: MANILA to ILOILO (ILOILO, P.I. REC'D / CEBU / DEC 3 4PM 1925)
250.00
8a
8f
 1925 DEC 1: MANILA to MASBATE
250.00
8a
8g
 1925 DEC 1: MANILA to DANSALAN
250.00
8b
8h
 1925 DEC 1: MANILA to TACLOBAN
250.00
8b
8i
 1925 DEC 1: MANILA to ZAMBOANGA
250.00
NR
8j
 1925 DEC 1: MANILA to ROMBLON (ROMBLON, ROMBLON, P.I. / DEC 11 2PM 1925)
350.00
8C
8k
 1925 DEC 11: MASBATE to MANILA (MANILA, P.I. / REC'D / DEC 12 10AM 1925)
350.00
8C
8l
 1925 DEC 11: TACLOBAN  to MANILA (MANILA, P.I. / REC'D / DEC 12 10AM 1925)
350.00
8C
8m
 1925 DEC 11: ROMBLON  to MANILA (MANILA, P.I. / REC'D / DEC 12 10AM 1925)
350.00
8d
8n
 1925 DEC 11: SURIGAO  to MANILA (MANILA, P.I. / REC'D / DEC 12 10AM 1925)
350.00
8d
8o
 1925 DEC 11: CAGAYAN, MISAMIS  to MANILA (MANILA, P.I. / REC'D / DEC 12 10AM 1925)
350.00
1926 SECOND INTER-ISLAND AIR SERVICE
NR
9
 1926 JAN 5: MANILA to CAPIZ (CAPIZ, P.I. / REC'D / CAPIZ / JAN 5 3PM 1926) 
300.00
NR
9a
 1926 JAN 5: MANILA to CEBU (CEBU, REC'D / CEBU, P.I. / JAN 5 3PM 1926)
300.00
NR
9b
 1926 JAN 5: MANILA to ILOILO (ILOILO, P.I. / REC'D / ILOILO / JAN 5 3PM 1926)
300.00
9a
9c
 1926 JAN 5: MANILA to SILAY (SILAY, OCC. NEGROS / REC'D / JAN 9 __ 1926) Via CEBU
300.00
NR
9d
 1926 JAN 5: MANILA to SURIGAO (SURIGAO, P.I. REC'D / SURIGAO / JAN 12 10AM 1926)  Via CEBU
300.00
NR
9e
 1926 JAN 8: MANILA to DANSALAN (DANSALAN, LANAO, P.I. / JAN 13 5PM 1926)
300.00
9d
9f
 1926 JAN 8: MANILA to MASBATE (MASBATE, P.I. / REC'D. / JAN 14 12M 1926)
300.00
9c
9g
 1926 JAN 8: MANILA to SAN JOSE
300.00
9b
9h
 1926 JAN 19: BATANGAS to MANILA 
300.00
1926 NORTHERN LUZON FLIGHTS
10b
10a
 1926 JAN 31: MANILA to SAN FERNANDO - RETURN (SAN FERNANDO, P.I. / REC'D / LA UNION / FEB 1 9AM 1926) Returned to Manila, February 9, with same day 8:30PM arrival. Less than 10 RT covers.
250.00
10a
10b
 1926 FEB 3: MANILA to CORREGIDOR - RETURN (CORREGIDOR REC'D / CAVITE / FEB 3 1926 5PM) Returned to Manila, February 4. Less than 10 RT covers.
250.00
10c
10c
 1926 FEB 3: MANILA to APARRI - RETURN (APARRI, P.I. / CAGAYAN / REC'D / FEB 3 2PM 1926) Returned to Manila, February 10. Less than 10 RT covers.
250.00
10f
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 1926 FEB 3: CORREGIDOR to SAN FERNANDO. Believed that this leg not flown at all as the airplane returned to Manila the following day.
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10g
------
 1926 FEB 3: CORREGIDOR to APARRI. Believed that this leg not flown at all as the airplane returned to Manila the following day.
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NR
10d
 1926 FEB 4: CORREGIDOR to MANILA
100.00
10h
10e
 1926 FEB 3: SAN FERNANDO to APARRI
100.00
10e
10f
 1926 FEB 9: SAN FERNANDO to MANILA
100.00
10i
10g
 1926 FEB 9: APARRI to SAN FERNANDO
100.00
10d
10h
 1926 FEB 10: APARRI to MANILA
100.00
NR
10i
 1926 APR 16: MANILA to CEBU. With "RECEIVED BY AEROPLANE" postmark.
250.00
NR
10j
 1926 APR 17: CEBU to ZAMBOANGA (ZAMBOANGA, ZAMBOANGA / APR 19 / 1926 10AM)
250.00
NR
10k
 1926 APR 22: MASBATE to MANILA (MANILA, P.I. / REC'D / APR 23 2:30PM 1926)
250.00
10AA
10AA
 1926 APR 22: BATANGAS to MANILA. Backstamped on 8PM of the same day.
100.00
1926 MADRID - MANILA FLIGHTS
11
11
 1926 MAY 13: APARRI to MANILA
30.00
11a
11a
 1926 MAY 12: 1926 MAY 13: CAMP STOTSENBERG to MANILA
400.00
11b
11b
 1926 APR 5: MADRID to MANILA
2,000.00
11c
11c
 1926 APR 5: MADRID to MANILA Postage Due Stamps
2,000.00
11d
11d
 1926 APR 21: CALCUTTA to MANILA
700.00
11e
11e
 1926 APR 23: BANGKOK to MANILA
2,000.00
NR
11f
 1926 MAY 2: SAIGON to MANILA
2,000.00
11f
11g
 1926 MAY 11: MACAO to MANILA
700.00

TO BE CONTINUED