The Federal Aviation Administration put Boston Logan International Airport under a long ground delay program on Wednesday, July 29, 2026, citing low ceilings compounded by low visibility and wind.
If you are flying into or through BOS tonight, treat this as a program delay day, not a five minute taxi hold. Recheck your airline app before you leave home and protect tight connections under the posted average delay near 106 minutes.
- What changed: FAA issued a CDM ground delay program for BOS on July 29, 2026.
- Program window: Arrivals estimated from about 1:00 pm Eastern through about 11:59 pm Eastern (1700Z July 29 to 0359Z July 30).
- Delay scale: Average delay 106 minutes, maximum delay 319 minutes on the advisory.
- Cause: Weather, low ceilings, with low visibility and wind as compounding factors.
- Runway note: Arrival rate of 36 depends on continued use of runway 4R; a shift to runway 15 could drop the rate to about 24 to 28.
What the FAA posted for Logan
According to the FAA ATCSCC ground delay program advisory for BOS, the control element is the airport and the impacting condition is weather with low ceilings.
The advisory sets a program rate of 36 and lists all contiguous United States departures feeding BOS, plus Canadian airports Halifax, Ottawa, Montreal, Toronto, Sault Ste. Marie, and Quebec City.
Comments state that arrivals use runway 4R and departures use runway 9. The 36 arrival rate is contingent on continued viability of runway 4R for arrivals.
If high southeast winds force a configuration change to arrive on runway 15, the rate will decrease to between 24 and 28. That is the traveler-facing warning that the delay stack can get worse without a new storm cell over the terminal.
Maximum delay is listed at 319 minutes and average delay at 106 minutes. Those numbers are assigned delay tools, not a promise that every flight lands exactly on that clock.
For local weather context behind the ceilings, travelers can watch the National Weather Service Boston forecast office while treating the FAA advisory as the airport capacity decision.
Who feels a Logan program outside Boston
A ground delay program meters arrivals by holding many flights at origin. A clear sky in Chicago, Atlanta, or Washington does not cancel a BOS arrival slot assignment.
JetBlue, Delta, American, United, and regional partners all feed Logan. A delayed inbound can also cancel or delay the next outbound even after ceilings improve.
Travelers using Logan as a New England connection should treat sub-90-minute connects as high risk while the average delay sits near 106 minutes. Ask for protected later flights before you leave the origin gate.
If your trip continues by car after landing, protect hotel and ferry windows with flexible cancellation. A three to five hour late arrival can push Cape and coastal transfers into closed counter hours.
For carrier product context while you wait, Deep Arrival keeps a JetBlue airline guide that many BOS travelers use, then still recheck live app status because a GDP overrides routine schedule marketing.
| If this is you | Do this now |
|---|---|
| Flying into BOS this evening | Expect program delay near the 106 minute average and protect hotel, rental, or ferry pickups. |
| Connecting through Logan | Treat sub-90-minute connects as at risk and ask about protected later flights early. |
| Flying out of BOS later tonight | Confirm whether your aircraft or crew is still inbound delayed before you leave for the airport. |
| Driving to Logan for a departure | Use airline app alerts and leave when the flight is still expected to operate. |
| Watching wind forecasts | If southeast winds force a 15 configuration, expect the rate to fall from 36 toward 24 to 28. |
How low ceilings create long average delays
Low ceilings force instrument approaches and can reduce how many aircraft Logan can accept each hour. Controllers then assign delay before takeoff so aircraft do not stack endlessly in holding patterns.
A maximum delay of 319 minutes means some flights can be pushed by more than five hours if their slot lands late in the program. That is why last-bank connections are fragile even when the first departure of the day looked fine.
The advisory also notes modified medium pop up and Time+45 language used by traffic managers when adjusting the program. Travelers should not treat the first delay assignment as frozen for the whole evening.
Ground stops are a different tool. Today the load-bearing public document for BOS is this ground delay program. If a stop is later posted, it will appear as a separate advisory on the same FAA surfaces.
Airline weather waivers, if any, are separate products from the FAA traffic tools and close on their own clocks. Check your carrier app for change fee policies after you confirm whether your flight is still operating.
Practical steps for the rest of July 29
Start with the airline app for gate, aircraft, and cancellation status. Use the FAA advisory for the system reason code when an agent says weather at Boston.
If you need a rebook, do it before the last evening bank empties. Logan recovery after ceiling events can spill into late departures that then hit crew time limits.
Bags and connections deserve early attention. A late inbound under a 319 minute max delay can break a same-evening Amtrak or bus transfer even if the flight eventually lands. Build a backup plan for that ground leg before you leave the origin city.
Travelers still on the ground at origin should ask whether their flight is holding for a BOS arrival slot. Sitting at the gate with an open boarding door is better than taxiing into an indefinite hold when average delay is already over 100 minutes.
If your plans are fully flexible, moving to the first morning flight can be cleaner than a midnight arrival. If your plans are work critical, stay on the protected itinerary and document delay notices for meeting changes.
- Program first: Treat the 1700Z to 0359Z window window as the active constraint until the FAA ends or revises it.
- Connections: Protect sub-90-minute BOS connects while average delay remains near 106 minutes.
- Config risk: Watch for a runway 15 change that could drop the arrival rate toward 24 to 28.
- Outbound risk: Late inbound aircraft and crews can cancel evening departures after ceilings improve.
- Source of truth: Airline app for your seat, FAA advisory for the system reason.
Logan low-ceiling programs can run for many hours with average delays above 100 minutes even when other Northeast airports look healthier. Tonight that combination is enough to break tight connects and late ground transfers.
Keep watching the FAA advisory and your airline app until your flight has a firm departure or arrival time. Do not treat a short improvement in ceiling reports as all-clear while the ground delay program is still metering arrivals into Boston.
Is Boston Logan under a ground delay program on July 29, 2026?
Yes. The FAA posted a CDM ground delay program for BOS with weather and low ceilings as the impacting condition.
What average delay did the FAA list for BOS?
The advisory lists an average delay of 106 minutes and a maximum delay of 319 minutes for the program window.
How long does the BOS program run?
Arrivals are estimated from about 1700Z July 29 through 0359Z July 30, roughly 1:00 pm through 11:59 pm Eastern on July 29.
Why does the advisory mention runway 4R and runway 15?
The 36 arrival rate depends on runway 4R. If winds force arrivals to runway 15, the FAA says the rate will decrease to about 24 to 28.
What should BOS travelers do first tonight?
Recheck the airline app, protect tight connections, and only leave for the airport when your specific flight still shows an expected operation after the current delay assignment.
